Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-08-01
Astrophys.J. 568 (2002) 820-829
Astronomy and Astrophysics
Astrophysics
9 pages, including one figure
Scientific paper
10.1086/338966
Gamma-Ray Burst (GRB) afterglows are well described by synchrotron emission from relativistic blast waves expanding into an external medium. The blast wave is believed to amplify the magnetic field and accelerate the electrons into a power law distribution of energies promptly behind the shock. These electrons then cool both adiabatically and by emitting synchrotron and inverse Compton radiation. The resulting spectra is known to consist several power law segments, which smoothly join at certain break frequencies. Here, we give a complete description of all possible spectra under those assumptions, and find that there are 5 possible regimes, depending on the ordering of the break frequencies. The flux density is calculated by integrating over the contributions from all the shocked region, using the Blandford McKee solution. This allows us to calculate more accurate expressions for the value of these break frequencies, and describe the shape of the spectral breaks around them. This also provides the shape of breaks in the light curves caused by the passage of a break frequency through the observed band. These new, more exact, estimates are different from more simple calculations by up to a factor of about 70, and describe some new regimes which where previously ignored.
Granot Jonathan
Sari Re'em
No associations
LandOfFree
The Shape of Spectral Breaks in GRB Afterglows 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 Shape of Spectral Breaks in GRB Afterglows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Shape of Spectral Breaks in GRB Afterglows will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-186221