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  • 101.
    Behlke, Rico
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    André, Mats
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    The electric potential at the Earth´s quasi-parallel bow shock: Initial Cluster results, American Institute of Physics2005In: The Physics of Collisioless ShocksArticle in journal (Refereed)
  • 102.
    Behlke, Rico
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
    André, Mats
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics, Space and Plasma Physics.
    Bale, Stuart D.
    Pickett, Jolene S.
    Cattell, Cynthia A.
    Lucek, Elizabeth A.
    Balogh, Andre
    Solitary structures associated with short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock2004In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 31, no 16Article in journal (Refereed)
    Abstract [en]

    [1] For the first time, solitary waves (SWs) have been observed within short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock. The SWs often occur as bipolar pulses in the electric field data and move parallel to the background magnetic field at velocities of v = 400–1200 km/s. They have peak-to-peak amplitudes in the parallel electric field of up to E = 65 mV/m and parallel scale sizes of L ∼ 10 λD. The bipolar solitary waves exhibit negative potential structures of ∣Φ∣ = 0.4–2.2 V, i.e., eΦ/kTe ∼ 0.1. None of the theories commonly used to describe SWs adequately address these negative potential structures moving at velocities above the ion thermal speed in a weakly magnetized plasma.

  • 103.
    Behlke, Rico
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
    André, Mats
    Buchert, Stephan C.
    Vaivads, Andris
    Eriksson, Anders I.
    Lucek, Elizabeth A.
    Balogh, Andre
    Multi-point electric field measurements of Short Large-Amplitude Magnetic Structures (SLAMS) at the Earth' quasi-parallel bow shock2003In: Geophysical Research Letters, ISSN 0094-8276, Vol. 30, no 4Article in journal (Refereed)
  • 104.
    Behlke, Rico
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Kucharek, Harald
    André, Mats
    Lucek, Elizabeth A.
    Dissipation properties of SLAMS upstream of the Earth's quasi-parallel bow shockManuscript (Other academic)
  • 105.
    Behlke, Rico
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Kucharek, Harald
    Bale, Stuart D.
    André, Mats
    Lucek, Elizabeth A.
    Cluster observations of the electric potential at the Earth's quasi-parallel bow shock2005In: Annales Geophysicae, ISSN 0992-7689Article in journal (Refereed)
  • 106.
    Behlke, Rico
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Kucharek, Harald
    Bale, Stuart D.
    André, Mats
    Lucek, Elizabeth A.
    The electric potentialat the Earth's quasi-parallel bow shock: Initial Cluster results2005In: The physics of collisionless shocks: 4th Annual IGPP International Astrophysics Conference, 2005, p. 79-83Chapter in book (Other academic)
  • 107.
    Bellot Rubio, L. R.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Borrero, J. M.
    Barklem, Paul
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    del Toro Iniesta, J. C.
    Accurate Atomic Parameters from the Solar Spectrum2003In: Frontiers of High Resolution Spectroscopy, 25th meeting of the IAU, Joint Discussion 20, 2003, p. p. 16-Conference paper (Other scientific)
  • 108. Belyaev, A
    et al.
    Barklem, Paul
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Ab initio cross sections for low-energy inelastic H+Li collisions2003Conference paper (Other (popular scientific, debate etc.))
  • 109. Belyaev, A. K.
    et al.
    Barklem, Paul
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Cross sections for low-energy inelastic H+Li collisions2003In: Physical Review A, Vol. 68, no 06, p. 2703-Article in journal (Refereed)
  • 110. Bensby, Thomas
    et al.
    Oey, Sally
    Feltzing, Sofia
    Gustafsson, Bengt
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics, Theoretical Astrophysics.
    Disentangling the Hercules Stream2007In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 655, no 2, p. L89-L92Article in journal (Refereed)
    Abstract [en]

    Using high-resolution spectra of nearby F and G dwarf stars, we have investigated the detailed abundance and age structure of the Hercules stream. We find that the stars in the stream have a wide range of stellar ages, metallicities, and element abundances. By comparing to existing samples of stars in the solar neighborhood with kinematics typical of the Galactic thin and thick disks, we find that the properties of the Hercules stream distinctly separate into the abundance and age trends of the two disks. Hence, we find it unlikely that the Hercules stream is a unique Galactic stellar population but rather is a mixture of thin and thick disk stars. This points toward a dynamical origin for the Hercules stream, probably caused by the Galactic bar.

  • 111.
    Bergfors, Carolina
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Warell, Johan
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    UBVRI Photometry of Mecury's Integral Phase Curve2007Conference paper (Other (popular scientific, debate etc.))
    Abstract [en]

    We present results from a photometric survey of Mecury's survey of Mecury's integral phase curve in the Johnson UBVRI system, obtained with the 0.9-m Westerlund Telescope in Uppsala, Sweden. CCD observations of the integrated disk have been obtained for the phase angle range 22-152 degrees. This is the first integral phase curve survey covering the extended visible spectrum of Mecury. We have derived absolute magnitudes and color indices from which Bond albedo, geometric albedo and phase integral have been determined for all bands.

    We have fitted the data in each band with the Mallama et a. (2002) V-band phase curve which is based on a wider range of more densely sampled phase angles. A magnitude-scaled Mallama phase curve provided adequate fits for each band within the photometric error budget. This implies no evidence of phase reddening in any color, which is in contrast to the Moon. The phase reddening for the Moon was determined by Lane and Irvine (1973) to 0.001 mag/degree between the wavelengths 445 nm and 550 nm.

    These data will be modeled to derive light scattering properties of the regolith. Of particular interest is the prediction of a disk-averaged normal albedo at 1064 nm with implications for the returned signal strength of the BepiColombo laser altimeter BELA (Gunderson et al, 2006).

  • 112. Bergman, J.
    et al.
    Carozzi, T. D.
    Karlsson, R.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Present and future applications of the Information Dense Antenna2004In: Proceedings of the HF-04, Nordic shortwave conference, Fårö, SwedenArticle in journal (Refereed)
  • 113. Bergman, J.
    et al.
    Carozzi, T.
    Karlsson, R.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Method and system for obtaining direction of an electromagnetic wave2002In: US Patent, no 512,219Article in journal (Refereed)
  • 114. Bergman, J.
    et al.
    Carozzi, T.
    Karlsson, R.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Multipoint antenna device2003In: International patent publication, no WO03/007422Article in journal (Refereed)
  • 115.
    Bergman, Jan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
    Dispersive and polarimetric properties of waves in space plasma2000Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Various aspects regarding dispersive and polarimetric properties of waves in space plasma are discussed from a theoretical viewpoint, which is extended to include numerical as well as experimental studies. From a more technical viewpoint, two scientific instruments are described. One of them is a three-axis digital radio receiver, aimed at measurg electromagnetic wave polarization from the ground or in space. The other is the dual Langmuir probe system on board the Astrid-2 micro-satellite, operational between January ll and July 24, 1999 which continuously measured the plasma density of the Earth's topside ionosphere. In more detail: The dispersive properties of small amplitude, high-frequency (HF) waves in relativistic, unmagnetized and magnetized plasm are investigated. The fully relativistic descriptn is shown to become important for electron temperatures in the 5-500 keV range and for wave frequencies about the gyro harmonics, even at lower temperatures. An exact expression for the relativistic plasma frequency is derived and shown to be proportional to the exact relativistic thermal velocity, thproportionality being the Debye length. An alternative derivation of the non-relativistic magnetized plasmpermittivity tensor is presented. Dispersion laws for electrostatic and electromagnetic waves in fully relativistic, unmagnetized Maxwell plasma are derived and compared with the corresponding dispersion laws obtained in the non-relativistic and the ultra-relativist approximations. A numerical solution of the fully relativistic dispersion equation is to this end used as a reference solution. To describe the polarimetric properties of electromagnetic waves from arbitrary directions, a generalization of the two-dimensional Stokes' parameters description of polarization to three dimensions is performed. The generalized formalism is then implemented in a three-axis digital radio receiver, primarily designed for determining the direction of arrival of electromagnetic waves. The wave normal of whistler waves, measured by the three-axis search coil magnetometer on board the Freja satellite, are analyzed. The wave normal is seen precess around the geomagnetic field B0 with an angle to B0 of 20°- 30°, indicating ducting by density structures. The Langmuir INterferometer and Density instrument for the Astrid-2 micro-atelli (LINDA) is discussed. LINDA data is used to map the earth's global plasma density at 1000h altitude. The density is shown to vary by at least four orders of magnitude, from below 10 cm-3 up to 100 000 cm-3. Seasonal variations in the auroral zone are reported and frequently occurring equatorial density enhancements are shown to be related to the Sun's rotation, and therefore to specific regions on the Sun's surface.

  • 116.
    Bergman, Jan
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Precession of the whistler polarisation plane normal obseved on Freja2005In: Geophys. Re. Lett., Vol. 32Article in journal (Refereed)
  • 117.
    Bergman, Jan
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    The magnetized plasma permittivity tensor2000In: PHYSICS OF PLASMAS, ISSN 1070-664X, Vol. 7, no 8, p. 3476-3479Article in journal (Refereed)
    Abstract [en]

    An alternative form of the nonrelativistic permittivity tensor for a homogeneous magnetized plasma in thermal equilibrium is derived in the linear approximation. The derivation follows the lines of Trubnikov's derivation of the relativistic permittivity t

  • 118.
    Bergman, Jan
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics, Space Plasma Physics.
    Eliasson, Bengt
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Scientific Computing.
    Linear wave dispersion laws in unmagnetized relativistic plasma: Analytical and numerical results2001In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 8, p. 1482-1492Article in journal (Refereed)
  • 119.
    Bergman, Jan E.S.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Karlsson, Roger L.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Complex Poynting theorem as a conservation law2005In: IEEE Trans. Antennas Propag., Vol. submittedArticle in journal (Refereed)
  • 120.
    Bergvall, N., Laurikainen, E., Aalto, S.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Galaxy interactions - poor starburst triggers. A study of a complete sample of > interacting galaxies. III.2003In: Astronomy and AstrophysicsArticle in journal (Refereed)
  • 121.
    Bergvall, N
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Masegosa, J
    Ostlin, G
    Cernicharo, J
    LWS spectroscopy of the luminous blue compact galaxy Haro 112000In: ASTRONOMY AND ASTROPHYSICS, ISSN 0004-6361, Vol. 359, no 1, p. 41-50Article in journal (Refereed)
    Abstract [en]

    We present the results of far infrared (FIR) spectroscopy of the luminous blue compact galaxy (BCG) Hare 11 (ESO 350-IG38) obtained with the Long Wavelength Spectrometer (LWS) on the Infrared Space Observatory (ISO) in low resolution mode. This metal poor

  • 122.
    Bergvall, N
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Ostlin, G
    Masegosa, J
    Zackrisson, E
    Starburst dwarfs - Fueling and morphological evolution1999In: ASTROPHYSICS AND SPACE SCIENCE, ISSN 0004-640X, Vol. 269, p. 625-628Article in journal (Refereed)
    Abstract [en]

    The effects of mergers in low mass galaxies are poorly understood. In this paper we analyze different observational evidences which support the view that mergers can trigger starbursts in dwarf galaxies. We discuss the relationships between blue compact g

  • 123.
    Bergvall, N.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Östlin, G.
    Massive (?) starburst hosts of blue compact galaxies (BCGs).Optical/near-IR observations of 4 BCGs and their companions2002In: Astronomy and Astrophysics, Vol. 390, p. 891-Article in journal (Refereed)
  • 124.
    Bergvall, Nils
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    The NOT in the 2000´s2000Conference proceedings (editor) (Refereed)
  • 125.
    Bergvall, Nils
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Universums medvetande2005In: HjärnstromArticle in journal (Other (popular scientific, debate etc.))
  • 126.
    Bergvall, NIls
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Marquart, ThomasUppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.Zackrisson, EricUppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Strange hosts of blue compact galaxies2005Conference proceedings (editor) (Refereed)
  • 127.
    Bergvall, Nils
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Marquart, Thomas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Zackrisson, Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    The starburst phenomenon from the optical/near-IR perpective2005Conference paper (Other (popular scientific, debate etc.))
  • 128.
    Bergvall, Nils
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Zackrisson, Eric
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    First detection of Lyman continuum leakage from a low redshift galaxy2004In: Astronomical Society of the Pasific, no 320, p. 346-Article in journal (Other (popular scientific, debate etc.))
  • 129.
    Bergvall, Nils
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Zackrisson, Eric
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Shaken not stirred. The BCG starburst receipe2003In: RevMexAA SCArticle in journal (Refereed)
  • 130.
    Bergvall, Nils
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. astronomi.
    Zackrisson, Erik
    Andersson, B-G
    Arnberg, Daniel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. astronomi.
    Masegosa, Josepha
    Östlin, Göran
    First detection of Lyman continuum escape from a local starburst galaxy. I. Observations of the luminous blue compact galaxy Haro 11 with the Far Ultraviolet Spectroscopic Explorer (FUSE)2006In: A&A, Vol. 448, no 513Article in journal (Refereed)
    Abstract [en]

    Context: .The dominating reionization source in the young universe has not yet been identified. Possible candidates include metal poor dwarf galaxies with starburst properties.Aims.We selected an extreme starburst dwarf, the Blue Compact Galaxy Haro 11, with the aim of determining the Lyman continuum escape fraction from UV spectroscopy.Methods.Spectra of Haro 11 were obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). A weak signal shortwards of the Lyman break is identified as Lyman continuum (LyC) emission escaping from the ongoing starburst. From profile fitting to weak metal lines we derive column densities of the low ionization species. Adopting a metallicity typical of the H II regions of Haro 11, these data correspond to a hydrogen column density of ~1019cm-2. This relatively high value indicates that most of the LyC photons escape through transparent holes in the interstellar medium. We then use spectral evolutionary models to constrain the escape fraction of the produced LyC photons.Results.Assuming a normal Salpeter initial mass function we obtain a Lyman continuum escape fraction of fesc˜ 4-10%. We argue that in a hierarchical galaxy formation scenario, the upper limit we derive for the escape rate allows for a substantial contribution to cosmic reionization by starburst dwarf galaxies at high redshifts.

  • 131.
    Bergvall, Nils
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Östlin, Göran
    Masegosa, J.
    Zackrisson, Eric
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Starburst drafts-fueling and morphological evolution2000In: Ap&SS, p. 269, 625-Article in journal (Refereed)
  • 132.
    Berthomier, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Pottelette, R
    Malingre, M
    Khotyaintsev, Y
    Electron-acoustic solitons in an electron-beam plasma system2000In: PHYSICS OF PLASMAS, ISSN 1070-664X, Vol. 7, no 7, p. 2987-2994Article in journal (Other scientific)
    Abstract [en]

    Electron-acoustic solitons exist in a two electron temperature plasma (with "cold" and "hot" electrons) and take the form of negative electrostatic potential pulses. They develop on a spatial scale of a few Debye lengths and propagate at the electron-acou

  • 133. Bessell, M.S.
    et al.
    Christlieb, Norbert
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy. Theoretical Astrophysics.
    Gustafsson, B.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy. Theoretical Astrophysics.
    On the oxygen abundance of HE0107-52402004In: Astrophysical Journal: Letters, Vol. 612, no 1, p. 61-63Article in journal (Refereed)
  • 134. Bikmaev, I.F.
    et al.
    Ryabchikova, T.C.
    Bruntt, H.
    Musaev, F.A.
    Mashonkina, L.I.
    Belyakova, E.V.
    Shimansky, V.V.
    Barklem, Paul
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    Galazutdinov, G.
    Abundance analysis of two late A-type stars HD 32115 and HD 375942002In: Astron. Astrophys., Vol. 389, p. 537-546Article in journal (Refereed)
  • 135.
    Biver, N
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Bockelee-Morvan, D
    Colom, P
    Crovisier, J
    Germain, B
    Lellouch, E
    Davies, JK
    Dent, WRF
    Moreno, R
    Paubert, G
    Wink, J
    Despois, D
    Lis, DC
    Mehringer, D
    Benford, D
    Gardner, M
    Phillips, TG
    Gunnarsson, M
    Rickman, H
    Winnberg, A
    Bergman, P
    Johansson, LEB
    Ra,
    Long-term evolution of the outgassing of comet Hale-Bopp from radio observations1997In: EARTH MOON AND PLANETS, ISSN 0167-9295, Vol. 78, no 1-3, p. 5-11Article in journal (Refereed)
    Abstract [en]

    C/1995 O1 (Hale-Bopp) has been observed on a regular basis since August 1995 at millimetre and submillimetre wavelengths using IRAM, JCMT, CSO and SEST radio telescopes. The production rates of eight molecular species (CO, HCN, CH3OH, H2CO, H2S, CS, CH3CN

  • 136.
    Bladh, Sara
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics, Theoretical Astrophysics.
    Susanne, Höfner
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Aringer, Bernhard
    Eriksson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Exploring wind-driving dust species in cool luminous giants III: Wind models for M-type AGB stars2015In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 575, article id A105Article in journal (Refereed)
  • 137.
    Blagoveshchenskaya, N.F., Kornienko, V.A., Borisova, T.D., Thidé, B., Kosch, M.J., Rietveld, M.T., Mishin, E.V., Luk'yanova, R.Y. and Troshichev, O.A.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Ionospheric HF pump wave triggering of local auroral activation.2001In: Journal of Geophysical Research, Vol. 106, p. 29071-29089Article in journal (Refereed)
    Abstract [en]

    Experimental results from ionospheric HF pumping experiments in the nightside auroral E region above Tromso are reported. We found intriguing evidence that a modification of the ionosphere-magnetosphere coupling, due to the effects of powerful HF waves be

  • 138.
    Blecki, J., Savin, S., Rothkaehl, H., Stasiewicz, K., Wronowski, R., Nemecek, Z., Safrankowa, J. and Kudela, K.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Wave-particle interaction in the polar cusp.2001In: Les Woolliscroft Memorial Conference Sheffield Space Plasma Meeting: Multipoint Measurements versus Theory. Proceedings (SP-492), 2001, p. 87-Conference paper (Other scientific)
    Abstract [en]

    This paper presents the review of the observations of the low frequency plasma waves together with plasma particles which were done by Interball 1 Magion-4 subsatellite to Interball 1 and Freja satellites in the different cusp regions. The detailed study

  • 139.
    Blewett, D.T, Warell, J.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    New Ground-based Spectral Observations of Mercury and Comparison with the Moon2003In: 34th Annual Lunar and Planetary Science Conference, 2003, no 3, p. 1155-1156Conference paper (Refereed)
    Abstract [en]

    New observations of Mercury and lunar locations were collected near-simultaneously. A Mercury spectrum (400-970 nm) calibrated to standard geometry was constructed. This spectrum permits analysis with abundance relations for Fe and Ti.

  • 140.
    Blomberg, M
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Henriksson, G
    Archaeoastronomy: New trends in the field, with methods and results from studies in Minoan Crete2001In: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, ISSN 0236-5731, Vol. 247, no 3, p. 609-619Article in journal (Refereed)
    Abstract [en]

    We describe briefly new trends in archaeoastronomy and present results from our studies on Crete to show what this field can contribute to archaeological investigations in the Bronze Age Aegean. Our basic method is the study of orientations, but contempor

  • 141.
    Blomqvist, Anna
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. astronomi.
    Bergvall, Nils
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. astronomi.
    Starburst and Poststarburst Galaxies from the Sloan Digital Sky Survey2007In: Galaxy Evolution Across the Hubble Time, 2007, p. 1-Conference paper (Other scientific)
  • 142. Blum, J.
    et al.
    Schräpler, R.
    Davidsson, Björn
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
    Trigo-Rodrigues, J.M
    The physics of protoplanetesimal dust agglomerates: I. Mechanical properties and relations to primitive bodies in the solar system2006In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 652, no 2, p. 1768-1781Article in journal (Refereed)
    Abstract [en]

    We present laboratory experiments on the formation of macroscopic dust aggregates. The centimeter-sized highly porous bodies are produced by random ballistic deposition from individual micrometer-sized dust particles. We find packing densities between 0.07 and 0.15 for uncompressed samples, dependent on the shape and size distribution of the constituent dust grains. Impacts into these bodies are simulated by uniaxial compression experiments. We find that the maximum compression, equivalent to the highest protoplanetary impact velocities of similar to 50ms(-1), increases the packing density to 0.20-0.33. Tensile strength measurements with our laboratory samples yield values in the range 200-1100 Pa for slightly compressed samples. We review packing densities and tensile strengths found for primitive solar system bodies, e. g., for comets, primitive meteorites, and meteoroids. We find a consistency between packing densities and tensile strengths of our laboratory samples with those from cometary origin.

  • 143. Bobrowsky, Peter
    et al.
    Rickman, HansUppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Theoretical Astrophysics. Astronomiska Observatoriet.
    Comet/Asteroid Impacts and Human Society2007Collection (editor) (Other scientific)
  • 144.
    Bockelee-Morvan, D
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Rickman, H
    C/1995 O1 (Hale-Bopp): Gas production curves and their interpretation1997In: EARTH MOON AND PLANETS, ISSN 0167-9295, Vol. 79, no 1-3, p. 55-77Article in journal (Refereed)
    Abstract [en]

    The discovery of C/1995 O1 (Hale-Bopp) at 7 AU from the Sun provided the first opportunity to follow the activity of a bright comet over a large range of heliocentric distances r(h). Production rates of a number of parent molecules and daughter species ha

  • 145.
    Boralv, E
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
    Eglitis, P
    Opgenoorth, HJ
    Donovan, E
    Reeves, G
    Stauning, P
    The dawn and dusk electrojet response to substorm onset2000In: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, ISSN 0992-7689, Vol. 18, no 9, p. 1097-1107Article in journal (Refereed)
    Abstract [en]

    We have investigated the time delay between substorm onset and related reactions in the dawn and dusk ionospheric electrojets, clearly separated from the nightside located substorm current wedge by several hours in MLT. We looked for substorm onsets occur

  • 146. Borrero, J. M.
    et al.
    Bellot Rubio, L. R.
    Barklem, Paul
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Observational Astronomy.
    del Toro Iniesta, J. C.
    Accurate atomic parameters for near-infrared spectral lines2003In: Astronomy & Astrophysics, Vol. 404, p. 749-762Article in journal (Refereed)
  • 147.
    Borälv, Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Cluster four spacecraft measurements of small travelling compression regions in the near-tail2003In: Geophys. Re. Lett., Vol. 30, no 23Article in journal (Other (popular scientific, debate etc.))
  • 148.
    Borälv, Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Correlation between groundbased observations of substorm signatures and magnetotail dynamics2005In: Ann.Geophys., Vol. 23, no 997-1011Article in journal (Other (popular scientific, debate etc.))
  • 149.
    Borälv, Eva
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Correlation between ground-based observations of substorm signatures and magnetotail dynamics2005In: Ann. Geophys., Vol. 23, p. 997-1011Article in journal (Refereed)
  • 150.
    Borälv, Eva
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics. Department of Physics and Astronomy, Space Plasma Physics.
    Substorm observations combining ground-based instruments and Clusters2002Conference proceedings (editor) (Refereed)
1234567 101 - 150 of 1015
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