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AN OBSERVED CORRELA...
AN OBSERVED CORRELATION BETWEEN THERMAL AND NON-THERMAL EMISSION IN GAMMA-RAY BURSTS
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Burgess, J. Michael (author)
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Preece, Robert D. (author)
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- Ryde, Felix (author)
- KTH,Partikel- och astropartikelfysik
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Veres, Peter (author)
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Meszaros, Peter (author)
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Connaughton, Valerie (author)
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Briggs, Michael (author)
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Pe'er, Asaf (author)
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- Iyyani, Shabnam (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Royal Institute of Technology, Sweden
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Goldstein, Adam (author)
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- Axelsson, Magnus (author)
- KTH,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Royal Institute of Technology, Sweden,Partikel- och astropartikelfysik
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Baring, Matthew G. (author)
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Bhat, P. N. (author)
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Byrne, David (author)
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Fitzpatrick, Gerard (author)
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Foley, Suzanne (author)
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Kocevski, Daniel (author)
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Omodei, Nicola (author)
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Paciesas, William S. (author)
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Pelassa, Veronique (author)
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- Kouveliotou, Chryssa (author)
- Stockholms universitet,Fysikum
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Xiong, Shaolin (author)
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Yu, Hoi-Fung (author)
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Zhang, Binbin (author)
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Zhu, Sylvia (author)
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: Astrophysical Journal Letters. - 2041-8205 .- 2041-8213. ; 784:2
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Recent observations by the Fermi Gamma-ray Space Telescope have confirmed the existence of thermal and non-thermal components in the prompt photon spectra of some gamma-ray bursts (GRBs). Through an analysis of six bright Fermi GRBs, we have discovered a correlation between the observed photospheric and non-thermal gamma-ray emission components of several GRBs using a physical model that has previously been shown to be a good fit to the Fermi data. From the spectral parameters of these fits we find that the characteristic energies, E-p and kT, of these two components are correlated via the relation E-p proportional to T-alpha which varies from GRB to GRB. We present an interpretation in which the value of the index alpha indicates whether the jet is dominated by kinetic or magnetic energy. To date, this jet composition parameter has been assumed in the modeling of GRB outflows rather than derived from the data.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- gamma-ray burst: general
- radiation mechanisms: non-thermal
- radiation mechanisms: thermal
- Theoretical Physics
- teoretisk fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Burgess, J. Mich ...
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Preece, Robert D ...
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Ryde, Felix
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Veres, Peter
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Meszaros, Peter
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Connaughton, Val ...
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show more...
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Briggs, Michael
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Pe'er, Asaf
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Iyyani, Shabnam
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Goldstein, Adam
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Axelsson, Magnus
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Baring, Matthew ...
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Bhat, P. N.
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Byrne, David
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Fitzpatrick, Ger ...
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Foley, Suzanne
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Kocevski, Daniel
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Omodei, Nicola
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Paciesas, Willia ...
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Pelassa, Veroniq ...
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Kouveliotou, Chr ...
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Xiong, Shaolin
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Yu, Hoi-Fung
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Zhang, Binbin
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Zhu, Sylvia
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show less...
- About the subject
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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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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Stockholm University
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Royal Institute of Technology