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arXiv 1706.09438astro-ph.HEastro-ph.SR
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双中子星系统的形成

Formation of Double Neutron Star Systems

T. M. Tauris, M. Kramer, P. C. C. Freire, N. Wex, H. -T. Janka, N. Langer, Ph. Podsiadlowski, E. Bozzo, S. Chaty, M. U. Kruckow, E. P. J. van den Heuvel, J. Ant… 展开作者

T. M. Tauris, M. Kramer, P. C. C. Freire, N. Wex, H. -T. Janka, N. Langer, Ph. Podsiadlowski, E. Bozzo, S. Chaty, M. U. Kruckow, E. P. J. van den Heuvel, J. Antoniadis, R. P. Breton, D. J. Champion

摘要:

双中子星(DNS)系统代表了极端的物理对象和恒星演化和二元相互作用的异国情调的旅程的终点。大量的DNS系统和它们的合并预计将分别使用平方公里阵列搜索无线电信标和高频引力波探测器(LIGO/VIRGO)来发现。在这里,我们讨论了DNS系统的所有关键特性,以及选择效应,并将最新的观测数据与各种物理过程的新理论进展相结合,旨在提高我们对它们形成的认识。我们研究了它们的祖先系统的关键相互作用,并评估了它们在高质量X射线双星阶段,共同的信封阶段和随后的情况下BB质量转移的吸积历史,并认为,第一次形成的NS已吸积最多$\sim 0.02\;M_{\odot}$。我们调查DNS质量,自旋和速度,特别是自旋周期,轨道周期和偏心率之间的相关性。大量的蒙特卡罗模拟的第二超新星(SN)事件进行外推前SN恒星的属性和探测爆炸。所有已知的近轨道DNS系统都与超剥离爆炸恒星相一致。虽然他们所产生的NS踢往往是小的,我们展示了一个大的蔓延踢的幅度,在一般情况下,可能取决于过去的相互作用历史的爆炸星,从而与NS质量。我们分析和讨论NS踢方向的基础上,我们的SN模拟。最后,我们讨论了近轨道DNS系统的终端演化,直到它们合并,并可能产生一个短的$γ$射线爆发。

英文摘要:

Double neutron star (DNS) systems represent extreme physical objects and the endpoint of an exotic journey of stellar evolution and binary interactions. Large numbers of DNS systems and their mergers are anticipated to be discovered using the Square-Kilometre-Array searching for radio pulsars and high-frequency gravitational wave detectors (LIGO/VIRGO), respectively. Here we discuss all key properties of DNS systems, as well as selection effects, and combine the latest observational data with new theoretical progress on various physical processes with the aim of advancing our knowledge on their formation. We examine key interactions of their progenitor systems and evaluate their accretion history during the high-mass X-ray binary stage, the common envelope phase and the subsequent Case BB mass transfer, and argue that the first-formed NSs have accreted at most $\sim 0.02\;M_{\odot}$. We investigate DNS masses, spins and velocities, and in particular correlations between spin period, orbital period and eccentricity. Numerous Monte Carlo simulations of the second supernova (SN) events are performed to extrapolate pre-SN stellar properties and probe the explosions. All known close-orbit DNS systems are consistent with ultra-stripped exploding stars. Although their resulting NS kicks are often small, we demonstrate a large spread in kick magnitudes which may, in general, depend on the past interaction history of the exploding star and thus correlate with the NS mass. We analyze and discuss NS kick directions based on our SN simulations. Finally, we discuss the terminal evolution of close-orbit DNS systems until they merge and possibly produce a short $γ$-ray burst.

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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