Probing Curvature Effects in the Fermi GRB 110920

Дата и время публикации : 2013-04-15T17:03:51Z

Авторы публикации и институты :
A. Shenoy
E. Sonbas
C. Dermer
L. C. Maximon
K. S. Dhuga
P. N. Bhat
J. Hakkila
W. C. Parke
G. A. Maclachlan
T. N. Ukwatta

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 8 pages, 11 figures, Accepted for publication in ApJ
Первичная категория: astro-ph.HE

Все категории : astro-ph.HE

Краткий обзор статьи: Curvature effects in Gamma-ray bursts (GRBs) have long been a source of considerable interest. In a collimated relativistic GRB jet, photons that are off-axis relative to the observer arrive at later times than on-axis photons and are also expected to be spectrally softer. In this work, we invoke a relatively simple kinematic two-shell collision model for a uniform jet profile and compare its predictions to GRB prompt-emission data for observations that have been attributed to curvature effects such as the peak-flux–peak-frequency relation, i.e., the relation between the $nu$F$_nu$ flux and the spectral peak, E$_{pk}$ in the decay phase of a GRB pulse, and spectral lags. In addition, we explore the behavior of pulse widths with energy. We present the case of the single-pulse Fermi GRB 110920, as a test for the predictions of the model against observations.

Category: Physics