onr:"swepub:oai:DiVA.org:su-116247"
Search: onr:"swepub:oai:DiVA.org:su-116247" > Extremely narrow sp...
- 1 of 1
- Previous record
- Next record
- To hitlist
Extremely narrow spectrum of GRB110920A : further evidence for localised, subphotospheric dissipation
-
- Iyyani, Shabnam, 1988- (author)
- KTH,Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),KTH Royal Institute of Technology, Sweden; Erasmus Mundus Joint Doctorate in Relativistic Astrophysics,Partikel- och astropartikelfysik
-
- Ryde, Felix (author)
- KTH,Partikel- och astropartikelfysik
-
- Ahlgren, Björn (author)
- KTH,Partikel- och astropartikelfysik
- show more...
- Burgess, J. Michael (author)
- Larsson, Josefin (author)
- Pe'er, A. (author)
- McGlynn, S. (author)
- show less...
- (creator_code:org_t)
- 2015-04-28
- 2015
- English.
- In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 450:2, s. 1651-1663
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Much evidence points towards that the photosphere in the relativistic outflow in GRBs plays an important role in shaping the observed MeV spectrum. However, it is unclear whether the spectrum is fully produced by the photosphere or whether a substantial part of the spectrum is added by processes far above the photosphere. Here we make a detailed study of the $\gamma$−ray emission from single pulse GRB110920A which has a spectrum that becomes extremely narrow towards the end of the burst. We show that the emission can be interpreted as Comptonisation of thermal photons by cold electrons in an unmagnetised outflow at an optical depth of $\tau \sim 20$. The electrons receive their energy by a local dissipation occurring close to the saturation radius. The main spectral component of GRB110920A and its evolution is thus, in this interpretation, fully explained by the emission from the photosphere including localised dissipation at high optical depths.
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
- radiation mechanisms: non-thermal
- radiation mechanisms: thermal
- gamma-ray burst: general
- Theoretical Physics
- teoretisk fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Monthly notices of the Royal Astronomical Society (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Iyyani, Shabnam, ...
- Ryde, Felix
- Ahlgren, Björn
- Burgess, J. Mich ...
- Larsson, Josefin
- Pe'er, A.
- show more...
- Lundman, Christo ...
- Axelsson, Magnus
- McGlynn, S.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Monthly notices ...
- By the university
- Stockholm University
- Royal Institute of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
