| Issue |
A&A
Volume 434, Number 2, May I 2005
|
|
|---|---|---|
| Page(s) | 623 - 627 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20041359 | |
| Published online | 11 April 2005 | |
The influence of jet geometry on light curves and spectra of GRB afterglows
1
Institute for Theoretical and Experimental Physics (ITEP), Bolshaya Cheremushkinskaya 25, 117218 Moscow, Russia e-mail: tolstov@mail.itep.ru
2
Max Plank Institute for Astrophysics(MPA), Karl-Schwarzschild-Str. 1, 85741 Garching, Germany e-mail: tolstov@mpa-garching.mpg.de
Received:
27
May
2004
Accepted:
4
January
2005
We have performed detailed calculations of spectra and light curves of GRB afterglows assuming that the observed GRBs can have a jet geometry. The calculations are based on an expanding relativistic shock GRB afterglow model where the afterglow is the result of synchrotron radiation of relativistic electrons with power-law energy distribution at the front of external shock being decelerated in a circumstellar medium. To determine the intensity on the radiation surface we numerically solve the full time-, angle- and frequency-dependent special relativistic transfer equation in the comoving frame using the method of long characteristics.
Key words: gamma rays: bursts / ISM: jets and outflows / radiative transfer
© ESO, 2005
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