标题： 未来引力波观测台对快速坍缩合并形成的吸积盘的直接测量 显示英文标题

标题： Direct Measurement of the Accretion Disk Formed in Prompt Collapse Mergers with Future Gravitational-Wave Observatories

摘要： 重r过程元素（例如金和铀）的生成地点尚不确定。 中子星并合是我们目睹其形成的唯一天体物理现象。 然而，由于对并合遗迹中形成的吸积盘的质量和角动量存在不确定性，并合产生的重元素数量仍然难以确定。 吸积盘中的物质也被认为为伽马射线爆发提供了能量。 我们从数值相对论模拟中发现，吸积盘会影响双星在并合时迅速坍缩为黑洞时产生的振铃引力波信号。 我们提出了一种方法， \emph{直接}测量双星合并中黑洞形成过程中留下的吸积盘质量，使用爱因斯坦望远镜或宇宙探测器等天文台，对于距离最远 30~Mpc 的双星，相对误差为 10%，相当于每年 0.001 到 0.25 个事件。 显示英文摘要

摘要： The production site of heavy r-process elements, such as Gold and Uranium, is uncertain. Neutron star mergers are the only astrophysical phenomenon in which we have witnessed their formation. However, the amount of heavy elements resulting from the merger remains poorly constrained, mainly due to uncertainties on the mass and angular momentum of the disk formed in the merger remnant. Matter accretion from the disk is also thought to power gamma ray-bursts. We discover from numerical relativity simulations that the accretion disk influences the ringdown gravitational-wave signal produced by binaries that promptly collapse to black-hole at merger. We propose a method to \emph{directly} measure the mass of the accretion disk left during black hole formation in binary mergers using observatories such as the Einstein Telescope or Cosmic Explorer with a relative error of 10\% for binaries at a distance of up to 30~Mpc, corresponding to an event rate of 0.001 to 0.25 events per year.