Dainotti 2007 GRB 060218与Ibc型超新星的成协

主要内容:
针对GRB 060218提出模型解释他们的成协，并提出fragmentation来解释超长的持续时间。

给出超新星和伽玛暴成协可能是来自于双星的模型。

精彩摘抄:
In order to fulfill both the above requirement, we assume that the progenitor of the GRB and the SN consists of a binary system formed by a NS close to its critical mass collapsing to a black hole, and a companion star evolved out of the main sequence originating the SN.

文章信息:

arXiv:0706.3209 [ps, pdf, other]

Title: GRB060218 and GRBs associated with Supernovae Ib/c

Authors: Maria Giovanna Dainotti, Maria Grazia Bernardini, Carlo Luciano Bianco, Letizia Caito, Roberto Guida, Remo Ruffini

Comments: 4 pages, 3 figures, to appear in A&A Letters

Subjects: Astrophysics (astro-ph)

We plan to fit the complete gamma- and X-ray light curves of the long duration GRB060218, including the prompt emission, in order to clarify the nature of the progenitors and the astrophysical scenario of the class of GRBs associated to SNe Ib/c. The initial total energy of the electron-positron plasma E_{e^\pm}^{tot}=2.32\times 10^{50} erg has a particularly low value similarly to the other GRBs associated with SNe. For the first time we observe a baryon loading B=10^{-2} which coincides with the upper limit for the dynamical stability of the fireshell. The effective CircumBurst Medium (CBM) density shows a radial dependence n_{cbm} \propto r^{-\alpha} with 1.0<\alpha<1.7>