Fan 2009 考虑GRB 080319B的中子衰变来解释光学

主要内容:
基本意思是中子衰变可以让shell晚碰撞, 导致晚期的内激波, 产生强的光学辐射

精彩摘抄:


文章信息:

arXiv:0901.2128 [ps, pdf, other]

Title: Naked-eye optical flash from GRB 080319B: Tracing the decaying neutrons in the outflow

Authors: Yi-Zhong Fan, Bing Zhang, Da-Ming Wei

Comments: 4 pages, accepted for publication in Phys. Rev. D as a Rapid Communication

Journal-ref: Phys. Rev. D 79, 021301(R) (2009)

Subjects: Astrophysics (astro-ph)

For an unsteady baryonic gamma-ray burst (GRB) outflow, the fast and slow proton shells collide with each other and produce energetic soft gamma-ray emission. If the outflow has a significant neutron component, the ultra-relativistic neutrons initially expand freely until decaying at a larger radius. The late time proton shells ejected from the GRB central engine, after powering the regular internal shocks, will sweep these $\beta-$decay products and give rise to very bright UV/optical emission. The naked-eye optical flash from GRB 080319B, an energetic explosion in the distant universe, can be well explained in this way.