Sökning: WFRF:(Iyyani Shabnam) > (2013) > Variable jet proper...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 04220naa a2200553 4500 | |
001 | oai:DiVA.org:su-93178 | |
003 | SwePub | |
008 | 130904s2013 | |||||||||||000 ||eng| | |
009 | oai:DiVA.org:kth-127493 | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-931782 URI |
024 | 7 | a https://doi.org/10.1093/mnras/stt8632 DOI |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1274932 URI |
040 | a (SwePub)sud (SwePub)kth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Iyyani, Shabnamu Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),KTH Royal Institute of Technology, Sweden4 aut0 (Swepub:su)siyya |
245 | 1 0 | a Variable jet properties in GRB 110721A :b time resolved observations of the jet photosphere |
264 | c 2013-06-29 | |
264 | 1 | b Oxford University Press (OUP),c 2013 |
338 | a print2 rdacarrier | |
500 | a AuthorCount:11; | |
500 | a QC 20130902 | |
520 | a Fermi Gamma-ray Space Telescope observations of GRB 110721A have revealed two emission components from the relativistic jet: emission from the photosphere, peaking at similar to 100 keV, and a non-thermal component, which peaks at similar to 1000 keV. We use the photospheric component to calculate the properties of the relativistic outflow. We find a strong evolution in the flow properties: the Lorentz factor decreases with time during the bursts from G similar to 1000 to similar to 150 (assuming a redshift z = 2; the values are only weakly dependent on unknown efficiency parameters). Such a decrease is contrary to the expectations from the internal shocks and the isolated magnetar birth models. Moreover, the position of the flow nozzle measured from the central engine, r(0), increases by more than two orders of magnitude. Assuming a moderately magnetized outflow we estimate that r(0) varies from 10(6) to similar to 10(9) cm during the burst. We suggest that the maximal value reflects the size of the progenitor core. Finally, we show that these jet properties naturally explain the observed broken power-law decay of the temperature which has been reported as a characteristic for gamma-ray burst pulses. | |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
653 | a gamma-ray burst: individual: GRB 110721A | |
653 | a Theoretical Physics | |
653 | a teoretisk fysik | |
700 | 1 | a Ryde, Felixu KTH,Partikel- och astropartikelfysik4 aut0 (Swepub:kth)u1tlyg6w |
700 | 1 | a Axelsson, Magnusu KTH,Stockholms universitet,Fysikum,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),KTH Royal Institute of Technology, Sweden,Fysik4 aut0 (Swepub:kth)u1pcmyc0 |
700 | 1 | a Burgess, J. M.4 aut |
700 | 1 | a Guiriec, S.4 aut |
700 | 1 | a Larsson, Josefinu KTH,Partikel- och astropartikelfysik4 aut0 (Swepub:kth)u12o773l |
700 | 1 | a Lundman, Christofferu KTH,Partikel- och astropartikelfysik4 aut0 (Swepub:kth)u1q20wv4 |
700 | 1 | a Moretti, Elenau KTH,Partikel- och astropartikelfysik4 aut0 (Swepub:kth)u1t69eg4 |
700 | 1 | a McGlynn, S.4 aut |
700 | 1 | a Nymark, Tanjau KTH,Fysik4 aut0 (Swepub:kth)u14p8rnp |
700 | 1 | a Rosquist, Kjellu Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),ICRANet, Italy4 aut0 (Swepub:su)kr |
710 | 2 | a Stockholms universitetb Fysikum4 org |
773 | 0 | t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 433:4, s. 2739-2748q 433:4<2739-2748x 0035-8711x 1365-2966 |
856 | 4 | u https://doi.org/10.1093/mnras/stt863y Fulltext |
856 | 4 | u https://academic.oup.com/mnras/article-pdf/433/4/2739/4891879/stt863.pdf |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-93178 |
856 | 4 8 | u https://doi.org/10.1093/mnras/stt863 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127493 |
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