Fynbo2006 两个没有超新星成份的长暴 2

主要内容:
现在基本认为长暴来自大质量恒星坍缩, 一般应该看到超新星成份. 所以如果没有看到, 则成了比较奇怪了. 特别是红移比较低暴, 更应该看到超新星成份, 而GRB060505(z=0.089)和GRB060614(z=0.125)就是两个例外.

精彩摘抄:

没有超新星成份的两个暴的光学余辉, 以及暴其他几个有超新星成份的暴的光学幅射移动到相同的红移处所得到的星等, 比这两个暴的星等高.

文章信息:
astro-ph/0608313
A new type of massive stellar death: no supernovae from two nearby long gamma ray bursts
Authors: Johan P. U. Fynbo, Darach Watson, Christina C. Thoene, Jesper Sollerman, Joshua S. Bloom, Tamara M. Davis, Jens Hjorth, Pall Jakobsson, Uffe G. Joergensen, Arnaud Cassan, José María Castro Cerón, Javier Gorosabel, Tobias C. Hinse, Brian L. Jensen, Sylvio Klose, Daniel Kocevski, Daniel Perley, Enrico Ramirez-Ruiz, Maximilian D. Stritzinger, Paul Vreeswijk, Ralph A. M. Wijers, Kristian G. Woller, Marta Zub, Dong Xu
Comments: Submitted to Nature on July 7. Posted on Nature website July 12, see this http URL Revised on August 10

Vol 444,1047|21/28 December 2006| doi:10.1038/nature05375