The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models

Details The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models

1999-10-04

arxiv.org/abs/astro-ph/9910060v1

Astrophys.J.534:559-564,2000

Astronomy and Astrophysics

Astrophysics

ApJ, submitted

Scientific paper

10.1086/308802

We present multi-frequency radio observations from the afterglow of GRB 980519 beginning 7.2 hours after the gamma-ray burst and ending 63 days later. The fast decline in the optical and X-ray light curves for this burst has been interpreted either as afterglow emission originating from a collimated outflow -- a jet -- or the result of a blast wave propagating into a medium whose density is shaped by the wind of an evolved massive star. These two models predict divergent behavior for the radio afterglow, and therefore, radio observations are capable, in principle, of discriminating between the two. We show that a wind model describes the subsequent evolution of the radio afterglow rather well. However, we see strong modulation of the light curve, which we interpret as diffractive scintillation. These variations prevent us from decisively rejecting the jet model.

Affiliated with

Also associated with

No associations

Rating

The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models 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 The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-643029