Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...537..785d&link_type=abstract
The Astrophysical Journal, Volume 537, Issue 2, pp. 785-795.
Astronomy and Astrophysics
Astronomy
88
Gamma Rays: Bursts, Gamma Rays: Theory, Radiation Mechanisms: Nonthermal
Scientific paper
We present detailed calculations of nonthermal synchrotron and synchrotron self-Compton (SSC) spectra radiated by blast waves that are energized by interactions with a uniform surrounding medium. Radio, optical, X-ray, and gamma-ray light curves and spectral indices are calculated for a standard parameter set that yields hard GRB spectra during the prompt emission phase. No lateral spreading of the blast wave is assumed. Absence of SSC hardenings in observed GRB X-ray afterglows indicates magnetic field generation toward equipartition as the blast wave evolves. EGRET detections of 100 MeV-GeV photons observed promptly and 90 minutes after GRB 940217 are attributed to nonthermal synchrotron radiation and SSC emission from a decelerating blast wave, respectively. The SSC process will produce prompt TeV emission that could be observed from GRBs with redshifts z<~0.1, provided γ-γ opacity in the source is small. Measurements of the time dependence of the 100 MeV-GeV spectral indices with the planned Gamma-ray Large Area Space Telescope mission will chart the evolution of the SSC component and test the external shock scenario. Transient optical and X-ray emissions from misaligned GRBs are generally much weaker than on-axis emissions produced by dirty and clean fireballs that would themselves not trigger a GRB detector; thus, detection of long-wavelength transients not associated with GRBs will not unambiguously demonstrate GRB beaming.
Chiang James
Dermer Charles D.
Mitman Kurt E.
No associations
LandOfFree
Beaming, Baryon Loading, and the Synchrotron Self-Compton Component in Gamma-Ray Bursts 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 Beaming, Baryon Loading, and the Synchrotron Self-Compton Component in Gamma-Ray Bursts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beaming, Baryon Loading, and the Synchrotron Self-Compton Component in Gamma-Ray Bursts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1717718