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arXiv 2008.09846astro-ph.HE
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来自BH-NS/BH祖先系统的特殊超新星特征

Special supernova signature from BH-NS/BH progenitor systems

He Gao, Liang-Duan Liu, Wei-Hua Lei, Li-Tao Zhao

摘要:

LIGO-Virgo科学合作组的引力波探测表明,黑洞和中子星(BH-NS)或BH-BH系统广泛存在于宇宙中,BH质量为数十个太阳质量。BH-NS/BH系统的形成有两种主要的假设,包括星系场中孤立的双星演化和稠密环境中的动力学相互作用。在这里,我们提出,如果BH-NS/BH系统是从孤立的双演化形成的,超新星(SN)信号与第二个核心崩溃将显示出一些可识别的功能,由于吸积反馈的同伴BH。根据二进制的属性,我们表明,SN光变曲线可能会出现一个尖锐的峰值周围$\sim10$天,亮度甚至在超亮SNe(例如$\sim10^{44}~\rm erg~s^{-1}$)的水平或呈现一个平台的功能,持续几十天的核心崩溃SNe的定期光度。将这些特殊SN信号的事件率密度与LIGO-Virgo探测到的BH-NS/BH系统的事件率密度进行比较,有助于区分BH-NS/BH形成通道。

英文摘要:

The gravitational-wave detection by the LIGO-Virgo scientific collaboration shows that the black hole and neutron star (BH-NS) or BH-BH systems with a BH mass of tens of solar masses widely exist in the universe. Two main types of scenarios have been invoked for the formation of BH-NS/BH systems, including isolated binary evolution in galactic fields and dynamical interactions in dense environments. Here we propose that if the BH-NS/BH systems are formed from isolated binary evolution, the supernova (SN) signal associated with the second core collapse would show some identifiable features, due to the accretion feedback from the companion BH. Depending on the binary properties, we show that the SN lightcurve could present a sharp peak around $\sim10$ days, with luminosity even at the level of the super luminous SNe ( e.g. $\sim10^{44}~\rm erg~s^{-1}$) or present a plateau feature lasting for several tens of days with regular luminosity of core collapse SNe. Comparing the event rate density of these special SN signals with the event rate density of LIGO-Virgo detected BH-NS/BH systems could help to distinguish the BH-NS/BH formation channel.

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