Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations

Details Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations

2005-10-10

arxiv.org/abs/astro-ph/0510256v1

Astronomy and Astrophysics

Astrophysics

28 pages, 8 figures

Scientific paper

There is now good evidence linking short-hard GRBs with both elliptical and spiral galaxies at relatively low redshifts, redshift of about 0.2. This contrasts with the average redshift of about 2 of long-duration events, which also occur only in star-forming galaxies. The diversity of hosts is reminiscent of type Ia supernovae, which are widely (but not universally) believed to originate from the coalescence of white dwarfs. By analogy, it has been postulated that short-hard bursts originate from neutron star mergers. Mergers, as well as stellar core-collapse events (type II SNe and long-duration GRBs) are accompanied by long-lived sub-relativistic components powered by radioactive decay of unstable elements produced in the explosion. It is therefore interesting to explore whether short duration events also have ejecta powered by radioactivity (i.e. that are supernova-like). Observations already inform us that any supernova like component in the first few well studied short hard bursts must be fainter than those typical of type Ia or core-collapse supernovae. Rather than refer to weaker supernova-like component as ``mini-super nova'', an etymologically indefensible term, I use the term {\it macronova}. I investigate the observability of macronovae powered by neutron decay and by radioactive Nickel. Separately, I note that a macronova will reprocess energetic emission arising from a long lived central source. I find that surprisingly interesting limits on the basic parameters of macronovae can be obtained provided observations are obtained with current 10-m class telescopes over a range of one hour to one day following the burst.

Affiliated with

Also associated with

No associations

Rating

Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations 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 Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-505174