This article has an erratum: [https://doi.org/10.1051/0004-6361:20041337]
Volume 396, Number 2, December III 2002
|Page(s)||705 - 713|
|Published online||03 December 2002|
Doppler effect of gamma-ray bursts in the fireball framework
Yunnan Observatory, National Astronomical Observatories, CAS, Kunming, Yunnan 650011, PR China
2 Chinese Academy of Science-Peking University joint Beijing Astrophysical Center, PR China
Corresponding author: Y.-P. Qin, email@example.com
Accepted: 26 September 2002
The influence of the Doppler effect in the fireball framework on the spectrum of gamma-ray bursts is investigated. The study shows that the shape of the expected spectrum of an expanding fireball remains almost the same as that of the corresponding rest frame spectrum for constant radiations of the bremsstrahlung, Comptonized, and synchrotron mechanisms as well as for that of the GRB model. The peak flux spectrum and the peak frequency are obviously correlated. When the value of the Lorentz factor becomes 10 times larger, the flux of fireballs would be several orders of magnitude larger. The expansion speed of fireballs is a fundamental factor of the enhancement of the flux of gamma-ray bursts.
Key words: gamma-rays: bursts / gamma-rays: theory / radiation mechanisms: nonthermal / relativity
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.