Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-05-17
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Astrophysical Journal Letters Four pages, 2 figures
Scientific paper
10.1086/312139
Numerous reports have been made of features, either in emission or absorption, in the 10 - 1000 keV spectra of some gamma-ray bursts. Originally interpreted in the context of Galactic neutron star models as cyclotron line emission and $e^+ - e^-$ annihilation features, the recent demonstration that the majority of GRBs lie at cosmological distances make these explanations unlikely. In this letter, we adopt a relativistic fireball model for cosmological GRBs in which dense, metal rich blobs or filaments of plasma are entrained in the relativistic outflow. In the context of this model, we investigate the conditions under which broadband features, similar to those detected, can be observed. We find a limited region of parameter space capable of reproducing the observed GRB spectra. Finally, we discuss possible constraints further high-energy spectral observations could place on fireball model parameters.
Hailey Charles J.
Harrison Fiona A.
Mori Kaya
No associations
LandOfFree
Gamma-Ray Burst Spectral Features: Interpretation as X-ray Emission From A Photoionized Plasma 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 Gamma-Ray Burst Spectral Features: Interpretation as X-ray Emission From A Photoionized Plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma-Ray Burst Spectral Features: Interpretation as X-ray Emission From A Photoionized Plasma will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-32544