典型文献
Pre-explosion Helium Shell Flash in Type Ia Supernovae
文献摘要：
I study the possibility that within the frame of the core degenerate (CD) scenario for type Ia supernovae (SNe Ia) the merger process of the core of the asymptotic giant branch (AGB) star and the white dwarf (WD) maintains an envelope mass of≈0.03 Me that causes a later helium shell flash. I estimate the number of pre-explosion helium shell flash events to be less than a few per cent of all CD scenario SNe Ia. A helium shell flash while the star moves to the left on the HR diagram as a post-AGB star (late thermal pulse—LTP) or along the WD cooling track (very LTP—VLTP) causes the star to expand and become a"born again"AGB star. Merger remnants exploding while still on the AGB form hydrogen-polluted peculiar SNe Ia, while an explosion inside an inflated born-again star results in an early flux excess in the light curve of the SN Ia. The fraction of systems that might show an early flux excess due to LTP/VLTP is
文献关键词：
中图分类号：
作者姓名：
Noam Soker
作者机构：
Department of Physics,Technion,Haifa,3200003,Israel
文献出处：
引用格式：
[1]Noam Soker-.Pre-explosion Helium Shell Flash in Type Ia Supernovae)[J].天文和天体物理学研究,2022(09):98-105
A类：
Supernovae,supernovae,SNe,VLTP,Merger,exploding,56Ni
B类：
Pre,explosion,Helium,Shell,Flash,Type,Ia,study,possibility,that,within,frame,core,degenerate,CD,scenario,type,merger,process,asymptotic,giant,branch,AGB,star,white,dwarf,WD,maintains,envelope,mass,causes,later,helium,shell,flash,estimate,number,pre,events,less,than,few,cent,while,moves,left,diagram,post,thermal,pulse,along,cooling,track,very,expand,become,born,again,remnants,still,form,hydrogen,polluted,peculiar,inside,inflated,results,early,flux,excess,light,curve,fraction,systems,might,show,due,much,below,observed,In,from,ejecta,collision,planetary,nebula,fallback,gas,mixing,outer,regions,Ongoing,sky,surveys,find,about,one,case,year,where,influences
AB值：
0.457211
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