The origin of the gamma-ray burst of GRB 060614

摘要：

The evidences of GRB060614 shows that it cannot be simply modeled by either of the popular mechanisms for theconventional gamma-ray bursts,either a colapsar origin for a long GRB or a merging origin for a short GRB．A new progenitormodel is required for this special gamma-ray burst．We propose here that the tidal disruption of a star by an intermediate massblack hole(IMBH)could be an ideal way to power the gamma-ray burst of GRB 060614．Our motivation is that the debris ofthe tidally disrupted star is likely to form all accretion disk surrounding the black hole．When the debris disk accretes at theEddington-rate,the thermal instability in the inner region of the disk results in the seed magnetic field to be amplified,creatingall ordered strong poloidal fields threading the black hole．A powerful jet extracted energy via BZ-process will be launched,giving birth to a burst．This is similar to the jets triggered by collapsars and binary mergers．The results show that the debrisaccreted onto the IMBH is a conceivable energy source for GRBs．

关键词： gamma rays bursts-black hole physics

作者: Y.Lu Y.E.Huang S.N.Zhang

作者单位: National Astronomical Observatories,Chinese Academy Of Sciences,Beijing 100012,China Department of Astronomy,Nanjing University,Nanjing 210093,China Physics Department and Center for Astrophysics,Tsinghua University,Beijingl00084,China

会议类型: 国际会议

会议名称: 2008 NanJing Gamma-Ray Burst Conference(2008年伽马暴国际研讨会)

会议地点: 南京

会议语种:英文

页码: 285-288

在线出版日期: 2008-06-23（万方平台首次上网日期，不代表论文的发表时间）