A Possible Explanation for the Radio ``Flare'' in the Early Afterglow of GRB990123
| dc.creator | Shi, Xiangdong | |
| dc.creator | Gyuk, Geza | |
| dc.date | 1999-03-01 | |
| dc.date.accessioned | 2026-07-07T02:30:38Z | |
| dc.date.available | 2026-07-07T02:30:38Z | |
| dc.description | We suggest that the deceleration of the relativistic shock by a denser part of the interstellar medium off line-of-sight produced the observed radio ``flare'' in the early afterglow of GRB990123. We find that this scenario is consistent with observations if the particle number density of this denser part of the medium is between $\sim 200$ and $\sim 2\times 10^4$ cm$^{-3}$. Because of the premature deceleration of part of the shock, the later stage of the afterglow should decay modestly faster than the powerlaw expected from an isotropic shock propagation. | |
| dc.description | 14 pages including 3 figures, submitted to ApJL | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9903023 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9903023 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/13883 | |
| dc.subject | Astrophysics | |
| dc.title | A Possible Explanation for the Radio ``Flare'' in the Early Afterglow of GRB990123 | |
| dc.type | text |