DISTINGUISHING BETWEEN FORMATION CHANNELS FOR BINARY BLACK HOLES WITH LISA
DISTINGUISHING BETWEEN FORMATION CHANNELS FOR BINARY BLACK HOLES WITH LISA
复制标题
DOI：
10.3847/2041-8205/830/1/l18
复制
发表时间：
2016-06
期刊：
影响因子：
--
通讯作者：
K. Breivik;C. Rodriguez;S. Larson;V. Kalogera;F. Rasio
中科院分区：
文献类型：
--
作者：
K. Breivik;C. Rodriguez;S. Larson;V. Kalogera;F. Rasio
最近对GW150914和GW151226的探测表明，在局部宇宙中存在着大量的恒星-质量双黑洞(BBH)合并。虽然地面引力波探测器仅限于观测双星合并前的最后时刻，但激光干涉仪空间天线(LISA)等天基探测器可以在较低的轨道频率观测双星，这样的系统可能仍然会编码关于双星形成历史的信息。特别是，LISA频段中BBH的轨道偏心率和质量可以一起用来区分在银河场中孤立形成的双星和在密集恒星环境(如球状星团)中形成的双星。在这封信中，我们探索了BBH种群在LISA频带中演化时的轨道偏心率和质量。总体而言，我们发现丽莎可以辨别出两个不同的群体。我们表明，无论是动态形成的还是孤立形成的二进制文件，都有可以用LISA测量的偏心率。最后，我们注意到孤立演化的低质量BBH的测量偏心率如何为黑洞诞生和共同包络演化的物理学提供详细的约束。
The recent detections of GW150914 and GW151226 imply an abundance of stellar-mass binary black hole (BBH) mergers in the local universe. While ground-based gravitational wave detectors are limited to observing the final moments before a binary merges, space-based detectors, such as the Laser Interferometer Space Antenna (LISA), can observe binaries at lower orbital frequencies where such systems may still encode information about their formation histories. In particular, the orbital eccentricity and mass of BBHs in the LISA frequency band can be used together to discriminate between binaries formed in isolation in galactic fields and those formed in dense stellar environments such as globular clusters. In this letter, we explore the orbital eccentricity and mass of BBH populations as they evolve through the LISA frequency band. Overall we find that there are two distinct populations discernible by LISA. We show that up to of binaries formed either dynamically or in isolation have eccentricities that are measurable with LISA. Finally, we note how measured eccentricities of low-mass BBHs evolved in isolation could provide detailed constraints on the physics of black hole natal kicks and common-envelope evolution.