Is GRB 100418A a Cosmic Twin of GRB 060614?

Journal of astrophysics and astronomy

En-Wei Liang2²  Lan-Wei Jia¹  Hou-Jun Lü²  Shu-Jin Hou² 

[1] College of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China.$$;Department of Physics, Guangxi University, Nanning 530004, China.$$

关键词: Gamma-rays: bursts;    X-rays: X-ray;    individual: GRB 100418A.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

GRB 100418A is a long burst at 𝑧 = 0.624 without detection of associated supernova (SN).We present a detailed analysis on this event and discuss possible origins of its multi-wavelength emission. The temporal features of this event is similar to GRB 060614, a well-known nearby long GRB without SN association (possibly a Type I GRB), indicating that the two events may be cosmic twins. However, both the circumburst medium density and the GRB classification based on the gamma-ray energy and spectrum suggest that GRB 100418A would be a Type II GRB. These results make a great puzzle on the progenitors of this kind of events, if they belong to the same population.

【 授权许可】

Unknown