论文标题
与GW190814面对密集物质和高核紧凑型恒星的高温化
Confronting GW190814 with hyperonization in dense matter and hypernuclear compact stars
论文作者
论文摘要
我们研究了高度不对称的二元紧凑物体合并事件GW190814中的光伴侣是一颗超核星。我们将密度功能理论与已调整为$λ$ hypernuclei的性能的功能以及由最巨大的毫秒脉冲星的群众所放置的天体物理约束，这是从优质实验中推断出的Mass-Radius范围，以及二进制中子恒星Merger事件GW170817。我们计算纯核和多核星的一般相关性静态和最大旋转的开普勒构型。我们发现，虽然核恒星与GW190814中的中子恒星广泛一致，但这意味着在密集的物质中没有新的自由度，最大是核饱和密度的6.5倍。允许对密集物质进行高温化，我们发现，即使对于最大的快速旋转构型，高核星的最大质量也与GW190814中光同伴的出色自然解释不一致，这意味着这一事件涉及两个黑洞，而不是一个黑洞，而不是一个中性星星和黑洞。
We examine the possibility that the light companion in the highly asymmetric binary compact object coalescence event GW190814 is a hypernuclear star. We use density functional theory with functionals that have been tuned to the properties of $Λ$ hypernuclei as well as astrophysical constraints placed by the masses of the most massive millisecond pulsars, the mass-radius range inferred from the NICER experiment, and the binary neutron star merger event GW170817. We compute general-relativistic static and maximally rotating Keplerian configurations of purely nucleonic and hypernuclear stars. We find that while nucleonic stars are broadly consistent with a neutron star being involved in GW190814, this would imply no new degrees of freedom in the dense matter up to 6.5 times the nuclear saturation density. Allowing for hyperonization of dense matter, we find that the maximal masses of hypernuclear stars, even for maximal rapidly rotating configurations, are inconsistent with a stellar nature interpretation of the light companion in GW190814, implying that this event involved two black holes rather than a neutron star and a black hole.
