Young 2007 用合成的方法检验伽玛暴的能源机制

主要内容:
采用蒙特卡罗模拟的方法，拟合不同能源机制模型可能产生伽玛暴的红移分布、金属丰度分布等，和实际观测的这些分布比较，最终确定那种能源机制是正确的。结论还不明朗。

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文章信息:
The Birthplaces of Gamma-Ray Bursts

Authors: Patrick A. Young (1,2), Chris L. Fryer (3,4) ((1) Applied Physics, Los Alamos National Lab, (2) Steward Observatory, (3) CCS Division, Los Alamos National Lab, (4) Department of Physics, University of Arizona)

(Submitted on 14 Mar 2007)

Abstract: We use population synthesis to construct distributions of gamma-ray bursts (GRBs) for different proposed progenitor models. We use a description of star formation that takes into account the evolution of metallicity with redshift and galaxy mass, the evolution of galaxy mass with redshift, and the star formation rate with galaxy mass and redshift. We compare predicted distributions with redshift and metallicity to observations of GRB host galaxies and find that the the simple models cannot produce the observed distributions, but that current theoretical models can reproduce the observations within some constraints on the fraction of fallback black holes that produce GRBs.

Comments:

17 pages, 9 figures, submitted to the Astrophysical Journal

Subjects:

Astrophysics (astro-ph)

Report number:

LA-UR-07-1149

Cite as:

arXiv:astro-ph/0703373v1