Zou 2007 伽玛暴的高辐射效率

主要内容:
用ApJ上050904相同的模型，假设后面喷出的所有sub－shell都相同，可以计算辐射效率，得到的效率可以很高。

精彩摘抄:


文章信息:
High Efficiency of Gamma-Ray Bursts Revisited

Authors: Y. C. Zou, Z. G. Dai

(Submitted on 7 Mar 2007)

Abstract: Using the conservation of energy and momentum during collisions of any two shells, we consider the efficiency of gamma-ray bursts by assuming that the ejecta from the central engine are equally massive and have the same Lorentz factors. We calculate the efficiency and the final Lorentz factor of the merged whole shell for different initial diversities of Lorentz factors and for different microscopic radiative efficiency. As a result, a common high efficiency in the range of 0.1 to 0.9 is considerable, and a very high value near 100% is also reachable if the diversity of the Lorentz factors is large enough.

Comments:

12 pages, 6 figures, accepted by JASR

Subjects:

Astrophysics (astro-ph)

Cite as:

arXiv:astro-ph/0703136v1