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Detection of a ther...
Detection of a thermal spectral component in the prompt emission of GRB 100724B
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Guiriec, Sylvain (author)
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Connaughton, Valerie (author)
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Briggs, Michael S. (author)
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Burgess, Michael (author)
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- Ryde, Felix (author)
- KTH,Partikel- och astropartikelfysik
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Daigne, Frederic (author)
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Mészáros, Peter (author)
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Goldstein, Adam (author)
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McEnery, Julie (author)
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Omodei, Nicola (author)
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Bhat, P. N. (author)
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Bissaldi, Elisabetta (author)
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Camero-Arranz, Ascension (author)
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Chaplin, Vandiver (author)
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Diehl, Roland (author)
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Fishman, Gerald (author)
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Foley, Suzanne (author)
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Gibby, Melissa (author)
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Giles, Misty M. (author)
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Greiner, Jochen (author)
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Gruber, David (author)
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von Kienlin, Andreas (author)
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Kippen, Marc (author)
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Kouveliotou, Chryssa (author)
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McBreen, Sheila (author)
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Meegan, Charles A. (author)
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Paciesas, William (author)
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Preece, Robert (author)
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Rau, Arne (author)
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Tierney, Dave (author)
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van der Horst, Alexander J. (author)
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Wilson-Hodge, Colleen (author)
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: ASTROPHYSICAL JOURNAL LETTERS. - 2041-8205. ; 727:2, s. L33-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Observations of GRB 100724B with the Fermi Gamma-Ray Burst Monitor find that the spectrum is dominated by the typical Band functional form, which is usually taken to represent a non-thermal emission component, but also includes a statistically highly significant thermal spectral contribution. The simultaneous observation of the thermal and non-thermal components allows us to confidently identify the two emission components. The fact that these seem to vary independently favors the idea that the thermal component is of photospheric origin while the dominant non-thermal emission occurs at larger radii. Our results imply either a very high efficiency for the non-thermal process or a very small size of the region at the base of the flow, both quite challenging for the standard fireball model. These problems are resolved if the jet is initially highly magnetized and has a substantial Poynting flux.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- acceleration of particles
- gamma-ray burst: individual (GRB 1000724B)
- gamma rays: stars
- radiation mechanisms: non-thermal
- radiation mechanisms: thermal
- Astronomy and astrophysics
- Astronomi och astrofysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Guiriec, Sylvain
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Connaughton, Val ...
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Briggs, Michael ...
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Burgess, Michael
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Ryde, Felix
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Daigne, Frederic
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show more...
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Mészáros, Peter
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Goldstein, Adam
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McEnery, Julie
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Omodei, Nicola
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Bhat, P. N.
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Bissaldi, Elisab ...
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Camero-Arranz, A ...
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Chaplin, Vandive ...
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Diehl, Roland
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Fishman, Gerald
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Foley, Suzanne
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Gibby, Melissa
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Giles, Misty M.
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Greiner, Jochen
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Gruber, David
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von Kienlin, And ...
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Kippen, Marc
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Kouveliotou, Chr ...
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McBreen, Sheila
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Meegan, Charles ...
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Paciesas, Willia ...
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Preece, Robert
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Rau, Arne
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Tierney, Dave
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van der Horst, A ...
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Wilson-Hodge, Co ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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ASTROPHYSICAL JO ...
- By the university
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Royal Institute of Technology