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Observation and modelling of dusty, low gravity L, and M dwarfs
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2009 (English)In: COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 2009, Vol. 1094, 283-290 p.Conference paper (Refereed)
Abstract [en]

Observational facilities allow now the detection of optical and IR spectra of young M- and L-dwarfs. This enables empirical comparisons with old M- and L- dwarfs, and detailed studies in comparison with synthetic spectra. While classical stellar atmosphere physics seems perfectly appropriate for old M-dwarfs, more physical and chemical processes, cloud formation in particular, needs to be modelled in the substellar regime to allow a detailed spectral interpretation. Not much is known so far about the details of the inset of cloud formation at the spectral transition region between M and L dwarfs. Furthermore there is observational evidence for diversity in the dust properties of objects having the same spectral type. Do we understand these differences? The question is also how young M- and L-dwarfs need to be classified, which stellar parameter do they have and whether degenerations in the stellar parameter space due to the changing atmosphere physics are present, like in the L-T transition region. The Splinter was driven by these questions which we will use to encourage interactions between observation and theory. Given the recent advances, both in observations and spectral modelling, an intensive discussion between observers and theoreticians will create new synergies in our field.

Place, publisher, year, edition, pages
2009. Vol. 1094, 283-290 p.
, AIP Conference Proceedings, ISSN 0094-243X ; 1094
Keyword [en]
Star formation, Low luminosity stars, subdwarfs, and brown dwarfs, Infrared spectrometers, auxiliary equipment, and techniques
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-171253DOI: 10.1063/1.3099103ISBN: 978-0-7354-0627-8OAI: oai:DiVA.org:uu-171253DiVA: diva2:510349
15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 21–25 July 2008, St. Andrews (Scotland)
Available from: 2012-03-15 Created: 2012-03-15 Last updated: 2012-10-11Bibliographically approved

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Heiter, Ulrike
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Observational Astronomy
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