论文标题
GW190814是一个黑洞 - 奇怪的夸克星系吗？
Was GW190814 a black hole -- strange quark star system?
论文作者
论文摘要
我们研究了GW190814来源中黑洞的低质量伴侣是一颗奇怪的夸克之星的可能性。在所谓的两户场景中，这种可能性是可行的，中子星和奇怪的夸克恒星共存。奇怪的夸克星可以达到GW190814指示的质量范围，$ m \ sim（2.5-2.67）M_ \ odot $，由于绝热索引的价值很大，而无需接近因果关系限制的声音。相反，中子星（实际上是两个家庭场景中的超声恒星）可以实现当前可用的天体物理和核物理限制，这些恒星需要更柔和的状态方程。在此方案中，可以满足非常恒星的巨大质量和小半径的要求，同时使用完全现实且具有物理动机的状态方程式。此外，对于订单的1.4 $ m_ \ odot $ star或小于11公里，可以获得半径，如果只有一个紧凑的恒星家族，这是不可能的。
We investigate the possibility that the low mass companion of the black hole in the source of GW190814 was a strange quark star. This possibility is viable within the so-called two-families scenario in which neutron stars and strange quark stars coexist. Strange quark stars can reach the mass range indicated by GW190814, $M\sim (2.5-2.67) M_\odot$ due to a large value of the adiabatic index, without the need for a velocity of sound close to the causal limit. Neutron stars (actually hyperonic stars in the two-families scenario) can instead fulfill the presently available astrophysical and nuclear physics constraints which require a softer equation of state. In this scheme it is possible to satisfy both the request of very large stellar masses and of small radii while using totally realistic and physically motivated equations of state. Moreover it is possible to get a radius for a 1.4 $M_\odot$ star of the order or less than 11 km, which is impossible if only one family of compact stars exists.
