Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003chjaa...3..526l&link_type=abstract
Chinese Journal of Astronomy & Astrophysics, Vol. 3, No. 6, p. 526-534
Astronomy and Astrophysics
Astrophysics
Gamma-Rays: Bursts, Dust: Extinction, Stars: Formation
Scientific paper
Broadband afterglow observations provide a probe of the density structure of the circumburst medium. In the spreading jet model, prompt and intense X-ray/UV radiation from the reverse shock may destroy and clear the dust in the circumburst cloud out to about 30 pc within the initial solid angle of the jet. As the jet expands significantly, optical radiation from the high-latitude part of the jet may suffer extinction by dust outside the initial solid angle, while radiation from the part within the initial solid angle can be observed without extinction. In previous studies, it is usually assumed that the extinction is complete. We calculate the extinction effect by taking the optical depth into account. Our numerical results show that a break appears in the light curve of optical afterglow but it extends over a factor of ˜ 80 in time rather than a factor of ˜ 10 in time for the case of strong dust extinction and a factor of ˜ 60 in time for the case without dust extinction. These results may provide a way to judge how large the number density of the circumburst cloud is. Finally, we carry out a detailed modeling for the afterglow of GRB 000926. Our model can provide a good fit to the multi-color observations of this event.
Dai Gao Z.
Huang Yong-Feng
Liang Shun-Lin
Lu Tan
No associations
LandOfFree
Extinction of Beamed Gamma-ray Burst Afterglows in a Dense Circumstellar Cloud does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extinction of Beamed Gamma-ray Burst Afterglows in a Dense Circumstellar Cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extinction of Beamed Gamma-ray Burst Afterglows in a Dense Circumstellar Cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-878367