In its third observing run, the Laser Interferometer Gravitational-Wave Observatory (LIGO)/Virgo Collaboration has announced a potential neutron star−black hole (NS−BH) merger candidate, GW190426_152155. Together with GW190814, these two events belong to a class of binaries with a secondary mass less than 3 M _⊙. While the secondary system in GW190426_152155 is consistent with being a neutron star (NS) with a mass of , that of GW190814 is a 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 NS−BH systems; however, the larger escape velocity of a system with more massive primary black hole (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 BH population when inferring their global characteristics.

在第三次观测中，激光干涉仪重力波天文台（LIGO）/处女座合作社宣布了潜在的中子星黑洞（NS-BH）合并候选人GW190426_152155。连同GW190814，这两个事件属于一类的二进制文件的与辅块小于3中号 _⊙。GW190426_152155中的次级系统与质量为的中子星（NS）一致，而GW190814的次级系统为物体，并算作首次确认的质量间隙物体检测。在这里，我们认为这两个事件可能具有如下共同点：两者均形成为NS-BH系统。但是，具有更大质量的初级黑洞（BH）的系统的较大逃逸速度会增加超新星爆炸导致形成NS的喷射物质的结合分数。此绑定的材料形成一个磁盘，该磁盘优先附着在NS上。此方案预测次要成分质量应与主要成分质量相关，这与GW190426_152155和GW190814一致。如果即将到来的观察结果证实了这一假设，则推断二元BH种群的整体特征时，可以将它们与GW190814类似的事件排除在外。