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Article: A detailed study on the equal arrival time surface effect in gamma-ray burst afterglows

TitleA detailed study on the equal arrival time surface effect in gamma-ray burst afterglows
Authors
KeywordsGamma rays: bursts
ISM: clouds
Relativity
Shock waves
Issue Date2007
PublisherScience Press.
Citation
Chinese Journal Of Astronomy And Astrophysics, 2007, v. 7 n. 3, p. 397-404 How to Cite?
AbstractDue 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 Identifierhttp://hdl.handle.net/10722/80368
ISSN
2010 Impact Factor: 0.849
2011 SCImago Journal Rankings: 0.335
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHuang, YFen_HK
dc.contributor.authorLu, Yen_HK
dc.contributor.authorWong, AYLen_HK
dc.contributor.authorCheng, KSen_HK
dc.date.accessioned2010-09-06T08:05:41Z-
dc.date.available2010-09-06T08:05:41Z-
dc.date.issued2007en_HK
dc.identifier.citationChinese Journal Of Astronomy And Astrophysics, 2007, v. 7 n. 3, p. 397-404en_HK
dc.identifier.issn1009-9271en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80368-
dc.description.abstractDue 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.languageengen_HK
dc.publisherScience Press.en_HK
dc.relation.ispartofChinese Journal of Astronomy and Astrophysicsen_HK
dc.subjectGamma rays: burstsen_HK
dc.subjectISM: cloudsen_HK
dc.subjectRelativityen_HK
dc.subjectShock wavesen_HK
dc.titleA detailed study on the equal arrival time surface effect in gamma-ray burst afterglowsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://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+afterglowsen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/1009-9271/7/3/09en_HK
dc.identifier.scopuseid_2-s2.0-34548753382en_HK
dc.identifier.hkuros129364en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34548753382&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume7en_HK
dc.identifier.issue3en_HK
dc.identifier.spage397en_HK
dc.identifier.epage404en_HK
dc.identifier.isiWOS:000247553300009-
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridHuang, YF=7501574835en_HK
dc.identifier.scopusauthoridLu, Y=7405476987en_HK
dc.identifier.scopusauthoridWong, AYL=20437073100en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK

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