超亮超新星ASASSN-15lh爆炸过程所需^(56)Ni的估算  

Estimation of ^(56)Ni Needed in the Explosion Process of the Super Luminous Supernova ASASSN-15lh

作　　者：冯丹丹[1] 刘门全[1] 罗夏[2] 罗志全[1] 冯中文[1] 唐德林[1] 

机构地区：[1]西华师范大学天文系,南充637002 [2]北京师范大学天文系,北京100875

出　　处：《天文学报》2017年第4期24-29,共6页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(U1331121)资助

摘　　要：超新星ASASSN-15lh是近期发现的一颗光变曲线类似于Ia型超新星(SN Ia)的超亮超新星(Super Luminous Super Novae,SLSNe).^(56)Ni的衰变状况与SN Ia爆炸过程中的光度直接相关,考虑生成核的退激发能,详细计算了超新星ASASSN-15lh爆炸环境中^(56)Ni衰变产生的热量,估算出所需的^(56)Ni的质量为31.32 M_⊙,与观测所得的光变曲线给出的ASASSN-15lh所需^(56)Ni≥30 M_⊙的估计相符.超新星ASASSN-15lh的爆发机制至今还在争论之中,计算结果为进一步研究该超新星的前身星和爆发机制提供参考.ASASSN-15lh is a super luminous supernova, whose light curve is similar to the type Ia supernova （SN Ia）. Since the luminosity of SN Ia is directly related to the decay of 56Ni, in this paper, we consider the de-excitation energy of the new nuclei and calculate the energy generated by the decay of 56Ni in the explosive environment of ASASSN-151h. The calculated 56Ni mass needed by the ASASSN-15lh explosion is 31.32M⊙. This result agrees with the estimation of the mass of 56Ni≥ 30M⊙ derived from the observed light curve of ASASSN-15lh. No agreement has reached for the explosion mechanism of supernova ASASSN-15lh so far. The calculation in this paper provides a reference for the further study on the progenitor and the mechanism of the supernova ASASSN-15lh.

关 键 词：超新星 普通 超新星 个别 ASASSN-15lh 核反应 恒星 演化 

分 类 号：P145[天文地球—天体物理]