Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998

Details Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998 Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998natur.395..663k&link_type=abstract

Nature, Volume 395, Issue 6703, pp. 663-669 (1998).

Mathematics

Logic

363

Scientific paper

Data accumulated over the past year strongly favour the idea that γ-ray bursts lie at cosmological distances, although the nature of the power source remains unclear. Here we report radio observations of the supernova SN1998bw, which exploded at about the same time, and in about the same direction, as the γ-ray burst GRB980425. At its peak, the supernova was unusually luminous at radio wavelengths. A simple interpretation of the data requires that the source expanded with an apparent velocity of at least twice the speed of light, indicating that the supernova was accompanied by a shock wave moving at relativistic speeds (the ejects of supernovae are typically characterized by non-relativistic velocities). The energy of the shock is at least 1049erg, with an inferred ejecta mass of 10-5 solar masses, and we suggest that the early phase of this shock wave produced the burst of γ-rays. Although in general the properties of supernovae are very different from those of γ-ray bursts, we argue that this unusual supernova establishes a second class of γ-ray burst, which is distinctly different from the cosmological kind.

Affiliated with

Also associated with

No associations

Rating

Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998 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 Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1100059