论文标题
Ligo和处女座在第三次观察的上半年观察到的低质量比率事件的常见起源
A Common Origin for Low Mass Ratio Events Observed by LIGO and Virgo in the First Half of the Third Observing Run
论文作者
论文摘要
在第三次观察过程中，Ligo/处女座的合作宣布了潜在的中子星 - 黑洞（NSBH）合并候选人GW190426_152155。这两个事件与GW190814一起属于一类二进制质量，其次级质量小于$ 3 \，m _ {\ odot} $。虽然GW190426_152155中的二级系统与成为中子星，质量为$ 1.5^{+0.8} _ { - 0.5} \，m _ {\ odot} $，GW190814的$ 2.59^{+0.09^{+0.08} _} m _ {\ odot} $对象，并将其视为对质量差距对象的第一个确认检测。在这里，我们认为这两个事件可能具有以下统一的起源：两者都是NSBH系统形成的。然而，具有更大质量bH的系统的较大逃逸速度增加了从超新星爆炸的喷射材料的结合分数，从而导致NS形成。该结合的材料形成磁盘，优先积聚在NS上。这种情况预测二级成分质量应与主要组分质量相关，该质量与GW190426_152155和GW190814一致。如果该假设通过即将进行的观察得到证实，则在推断出其全球特征时，可以将类似GW190814的事件排除在二进制黑洞中。
In its third observing run, the LIGO/Virgo collaboration has announced a potential neutron star-black hole (NSBH) merger candidate, GW190426_152155. Together with GW190814, these two events belong to a class of binaries with a secondary mass less than $3 \, M_{\odot}$. While the secondary system in GW190426_152155 is consistent with being a neutron star with a mass of $1.5^{+0.8}_{-0.5} \, M_{\odot}$, that of GW190814 is a $2.59^{+0.08}_{-0.09} \, M_{\odot}$ object and counts as the first confirmed detection of a mass-gap object. Here we argue that these two events could have a common origin as follows: both are formed as NSBH systems; however, the larger escape velocity of a system with more massive primary BH increases the bound fraction of the ejecta material from the supernova explosion leading to the formation of a NS. This bound material forms a disk, which is preferentially accreted onto the NS. This scenario predicts the secondary component mass should correlate with the primary component mass, which is consistent with GW190426_152155 and GW190814. If this hypothesis is corroborated by upcoming observations, GW190814-like events can be excluded from the binary black hole population when inferring their global characteristics.
