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arXiv 2309.04466astro-ph.SRastro-ph.GAastro-ph.HE
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本星系群共生星族群及其与Ia型超新星的微弱关系

The Local Group Symbiotic Star Population and its Weak Relation with Type Ia Supernovae

M. Laversveiler, D. R. Gonçalves

AI总结:

本研究评估了本星系群共生星族群规模,发现其并非Ia型超新星的主要前身星,仅有极少数超新星源于共生系统。

摘要:

在此,我们研究了本星系群各星系中的共生星(SySt)族群及其与Ia型超新星(SNe Ia)的关系。SySt是低质量和/或中等质量演化双星系统,其中白矮星(WD)从一颗巨星吸积质量。一部分此类WD的质量可能增至足以达到钱德拉塞卡质量。因此,SySt被认为是潜在的SNe Ia前身星。采用经验与统计两种方法,我们估计银河系的SySt族群最小值为$1.69\ imes10^3$,期望值为$3.23\ imes10^4$。对于本星系群矮星系,计算得出的SySt族群数量低2至4个数量级。关于具有SySt前身星的SNe Ia,我们的总体结论是SySt并非主要的SNe Ia前身星。另一方面,我们仍预计银河系中约0.5-8%的SNe Ia具有共生前身星,而大多数低质量矮星系未曾经历过共生型Ia超新星。

英文摘要:

Here we study the symbiotic stars (SySt) population and its relation with type Ia supernovae (SNe Ia) in the galaxies of the Local Group. SySt are low- and/or intermediate-mass evolved binary systems where a white dwarf (WD) accretes mass from a giant star. A fraction of these WDs can become massive enough to reach the Chandrasekhar mass. Therefore, SySt have been considered as potential SNe Ia progenitors. Taking two approaches, one empirical and another statistical, we estimated the SySt population on the Galaxy as having a minimum value of $1.69\times10^3$ and a expected one of $3.23\times10^4$. For Local Group dwarfs galaxies, the computed SySt population ranges from 2 to 4 orders of magnitudes lower. Concerning the SNe Ia with SySt progenitors, our general result is that SySt are not the main SNe Ia progenitors. On the other hand, we still expect that about 0.5-8% of the SNe Ia have symbiotic progenitors in the Milky Way, while the majority of the - low-mass - dwarfs galaxies did not experience a symbiotic type Ia supernova.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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