| Type |
Journal Article |
| Names |
Davide Lazzati, Brian J. Morsony, Christopher H. Blackwell, Mitchell C. Begelman |
| Publication |
The Astrophysical Journal |
| Volume |
750 |
| Issue |
1 |
| Pages |
68 |
| Date |
May 1, 2012 |
| URL |
http://adsabs.harvard.edu/abs/2012ApJ...750...68L |
| Library Catalog |
NASA ADS |
| Abstract |
We present a set of numerical simulations of stellar explosions induced
by relativistic jets emanating from a central engine sitting at the
center of compact, dying stars. We explore a wide range of durations of
the central engine activity, two candidate stellar progenitors, and two
possible values of the total energy release. We find that even if the
jets are narrowly collimated, their interaction with the star unbinds
the stellar material, producing a stellar explosion. We also find that
the outcome of the explosion can be very different depending on the
duration of the engine activity. Only the longest-lasting engines result
in successful gamma-ray bursts. Engines that power jets only for a short
time result in relativistic supernova (SN) explosions, akin to observed
engine-driven SNe such as SN2009bb. Engines with intermediate durations
produce weak gamma-ray bursts, with properties similar to nearby bursts
such as GRB 980425. Finally, we find that the engines with the shortest
durations, if they exist in nature, produce stellar explosions that lack
sizable amounts of relativistic ejecta and are therefore dynamically
indistinguishable from ordinary core-collapse SNe. |
| Tags |
gamma-ray burst: general, hydrodynamics, supernovae: general, supernovae: individual: SN2009bb |