SwePub
Sök i LIBRIS databas

  Extended search

WFRF:(Wang Xiang Gao)
 

Search: WFRF:(Wang Xiang Gao) > A CORRELATED STUDY ...

  • Li, LiangKTH,Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),KTH Royal Institute of Technology, Sweden,Partikel- och astropartikelfysik (author)

A CORRELATED STUDY OF OPTICAL AND X-RAY AFTERGLOWS OF GRBs

  • Article/chapterEnglish2015

Publisher, publication year, extent ...

  • 2015
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-118539
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-118539URI
  • https://doi.org/10.1088/0004-637X/805/1/13DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172241URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20150821
  • We study an extensive sample of 87 gamma-ray bursts (GRBs) for which there are well-sampled and simultaneous optical and X-ray light curves. We extract the cleanest possible signal of the afterglow component. and compare the temporal behaviors of the X-ray light. curve, observed by Swift XRT, and optical data, observed by UVOT and ground-based telescopes for each individual burst. Overall we find that 62% of the GRBs. are consistent with the standard afterglow model. When more advanced modeling is invoked, up to 91% of the bursts in our sample may be consistent with the external-shock model. A large fraction of these bursts are consistent with occurring in a constant interstellar density medium (61%) while only 39% of them occur in a wind-like medium. Only nine cases have afterglow light curves that exactly match the standard fireball model prediction, having a single power-law decay in both energy bands that are observed during their entire duration. In particular, for the bursts with chromatic behavior, additional model assumptions must be made over limited segments of the light curves in order for these bursts to fully agree with the external-shock model. Interestingly, for 54% of the X-ray and 40% of the optical band observations, the end of the shallow decay (t(similar to-0.5)) period coincides with the jet-break (t(similar to-p)) time, causing an abrupt change in decay slope. The fraction of the burst that is consistent with the external-shock model is independent of the observational epochs in the rest frame of GRBs. Moreover, no cases can be explained by the cooling frequency crossing the X-ray or optical band.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Wu, Xue-Feng (author)
  • Huang, Yong-Feng (author)
  • Wang, Xiang-Gao (author)
  • Tang, Qing-Wen (author)
  • Liang, Yun-Feng (author)
  • Zhang, Bin-Bin (author)
  • Wang, Yu (author)
  • Geng, Jin-Jun (author)
  • Liang, En-Wei (author)
  • Wei, Jian-Yan (author)
  • Zhang, Bing (author)
  • Ryde, FelixKTH,Partikel- och astropartikelfysik(Swepub:kth)u1tlyg6w (author)
  • Stockholms universitetFysikum (creator_code:org_t)

Related titles

  • In:Astrophysical Journal805:10004-637X1538-4357

Internet link

Find in a library

To the university's database

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.

 
pil uppåt Close

Copy and save the link in order to return to this view