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Neutrino emission from high-energy component gamma-ray bursts
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2010 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 721, no 2, 1891-1899 p.Article in journal (Refereed) Published
Abstract [en]

Gamma-ray bursts (GRBs) have the potential to produce the particle energies (up to 10(21) eV) and energy budget (10(44) erg yr(-1) Mpc(-3)) to accommodate the spectrum of the highest energy cosmic rays; on the other hand, there is no observational evidence that they accelerate hadrons. The Fermi Gamma-ray Space Telescope recently observed two bursts that exhibit a power-law high-energy extension of a typical (Band) photon spectrum that extends to similar to 30 GeV. On the basis of fireball phenomenology we argue that these two bursts, along with GRB941017 observed by EGRET in 1994, show indirect evidence for considerable baryon loading. Since the detection of neutrinos is the only unambiguous way to establish that GRBs accelerate protons, we use two methods to estimate the neutrino flux produced when they interact with fireball photons to produce charged pions and neutrinos. While the number of events expected from the two Fermi bursts discussed is small, should GRBs be the sources of the observed cosmic rays, a GRB941017-like event that has a hadronic power-law tail extending to several tens of GeV will be detected by the IceCube neutrino telescope.

Place, publisher, year, edition, pages
2010. Vol. 721, no 2, 1891-1899 p.
Keyword [en]
gamma-ray burst: general, gamma-ray burst: individual (GRB941017, GRB090510, GRB090902b)
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-134809DOI: 10.1088/0004-637X/721/2/1891ISI: 000282193600078OAI: oai:DiVA.org:uu-134809DiVA: diva2:373859
Available from: 2010-12-01 Created: 2010-12-01 Last updated: 2010-12-01Bibliographically approved

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