Thoene 2007 GRB 060505的宿主星系

主要内容:
给出了该暴宿主星系的空间分辨，得到改宿主星系为Sbc型，在一般长暴不常见；暴大致处于恒星形成区，又和4s持续时间定为短暴不一致。

精彩摘抄:


文章信息:
arXiv:0706.0674 [ps, pdf, other] : Title: The spatially resolved host of GRB 060505 and implications for the nature of the progenitor
Authors: Christina C. Thoene, Johan P. U. Fynbo
Comments: 5 pages, 1 figure. Proceedings of the Amsterdam conference, 10 years of GRB afterglows, March 19-23, 2007, to appear in New Astronomy Reviews

We present a study of the host galaxy of the Gamma-Ray Burst (GRB) of May 5 2006 (GRB 060505). The host is spatially resolved in both imaging data and in a long slit spectrum including the GRB site. We find the galaxy to be a Sbc spiral, which is unusual for a long GRB host galaxy. The site of the GRB is considerably different from the rest of the galaxy with intense star formation, low metallicity and a young age. This suggest a massive stellar progenitor rather than a merger of compact objects which has been suggested based on the the relatively short duration of T_90=4s for the prompt emission.