Iron line in the afterglow: a key to the progenitor
| dc.creator | Lazzati, Davide | |
| dc.creator | Ghisellini, Gabriele | |
| dc.creator | Campana, Sergio | |
| dc.date | 1999-06-16 | |
| dc.date.accessioned | 2026-07-07T02:32:03Z | |
| dc.date.available | 2026-07-07T02:32:03Z | |
| dc.description | The discovery of a powerful and transient iron line feature in the X-ray afterglow spectrum of GRB 970508 and GRB 970828, if confirmed, would be a major breakthrough for understanding the nature the progenitor of gamma-ray bursts. We show that a large mass of iron very close to the burster is necessary to produce the emission line. This in itself strongly limits the possible progenitor of the gamma-ray event, suggesting the former explosion of a supernova, as predicted in the Supranova model (Vietri & Stella 1998). The line emission process and the line intensity depend strongly on the age, density and temperature of the remnant. The simultaneous observation of the iron line and of a power-law optical afterglow lasted for one year strongly suggest that the burst emission is isotropic. Recent observations of GRB 990123 are also discussed. | |
| dc.description | 8 pages, 1 postscript figure, proceedings of the workshop: "Gamma-Ray Bursts: the first three minutes", hald in Graftavallen (S), february 1999 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9906268 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9906268 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14372 | |
| dc.subject | Astrophysics | |
| dc.title | Iron line in the afterglow: a key to the progenitor | |
| dc.type | text |