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Article: A detailed study on the equal arrival time surface effect in gamma-ray burst afterglows
Title | A detailed study on the equal arrival time surface effect in gamma-ray burst afterglows |
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Authors | |
Keywords | Gamma rays: bursts ISM: clouds Relativity Shock waves |
Issue Date | 2007 |
Publisher | Science Press. |
Citation | Chinese Journal Of Astronomy And Astrophysics, 2007, v. 7 n. 3, p. 397-404 How to Cite? |
Abstract | Due to the relativistic motion of gamma-ray burst remnant and its deceleration in the circumburst medium, the equal arrival time surfaces at any moment are not spherical, rather, they are distorted ellipsoids. This will leave some imprints in the afterglows. We study the effect of equal arrival time surfaces numerically for various circumstances, i.e., isotropic fireballs, collimated jets, density jumps and energy injection events. For each case, a direct comparison is made between including and not including the effect. For isotropic fireballs and jets viewed on axis, the effect slightly hardens the spectra and postpones the peak time of the afterglows, but does not change the shapes of the spectra and light curves significantly. In the cases of a density jump or an energy injection, the effect smears out the variations in the afterglows markedly. |
Persistent Identifier | http://hdl.handle.net/10722/80368 |
ISSN | 2010 Impact Factor: 0.849 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Huang, YF | en_HK |
dc.contributor.author | Lu, Y | en_HK |
dc.contributor.author | Wong, AYL | en_HK |
dc.contributor.author | Cheng, KS | en_HK |
dc.date.accessioned | 2010-09-06T08:05:41Z | - |
dc.date.available | 2010-09-06T08:05:41Z | - |
dc.date.issued | 2007 | en_HK |
dc.identifier.citation | Chinese Journal Of Astronomy And Astrophysics, 2007, v. 7 n. 3, p. 397-404 | en_HK |
dc.identifier.issn | 1009-9271 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/80368 | - |
dc.description.abstract | Due to the relativistic motion of gamma-ray burst remnant and its deceleration in the circumburst medium, the equal arrival time surfaces at any moment are not spherical, rather, they are distorted ellipsoids. This will leave some imprints in the afterglows. We study the effect of equal arrival time surfaces numerically for various circumstances, i.e., isotropic fireballs, collimated jets, density jumps and energy injection events. For each case, a direct comparison is made between including and not including the effect. For isotropic fireballs and jets viewed on axis, the effect slightly hardens the spectra and postpones the peak time of the afterglows, but does not change the shapes of the spectra and light curves significantly. In the cases of a density jump or an energy injection, the effect smears out the variations in the afterglows markedly. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Science Press. | en_HK |
dc.relation.ispartof | Chinese Journal of Astronomy and Astrophysics | en_HK |
dc.subject | Gamma rays: bursts | en_HK |
dc.subject | ISM: clouds | en_HK |
dc.subject | Relativity | en_HK |
dc.subject | Shock waves | en_HK |
dc.title | A detailed study on the equal arrival time surface effect in gamma-ray burst afterglows | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1009-9271&volume=7&spage=397&epage=404&date=2007&atitle=A+detailed+study+on+the+equal+arrival+time+surface+effect+in+gamma-ray+burst+afterglows | en_HK |
dc.identifier.email | Cheng, KS: hrspksc@hkucc.hku.hk | en_HK |
dc.identifier.authority | Cheng, KS=rp00675 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1088/1009-9271/7/3/09 | en_HK |
dc.identifier.scopus | eid_2-s2.0-34548753382 | en_HK |
dc.identifier.hkuros | 129364 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-34548753382&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 7 | en_HK |
dc.identifier.issue | 3 | en_HK |
dc.identifier.spage | 397 | en_HK |
dc.identifier.epage | 404 | en_HK |
dc.identifier.isi | WOS:000247553300009 | - |
dc.publisher.place | China | en_HK |
dc.identifier.scopusauthorid | Huang, YF=7501574835 | en_HK |
dc.identifier.scopusauthorid | Lu, Y=7405476987 | en_HK |
dc.identifier.scopusauthorid | Wong, AYL=20437073100 | en_HK |
dc.identifier.scopusauthorid | Cheng, KS=9745798500 | en_HK |
dc.identifier.issnl | 1009-9271 | - |