The hunt for sub-solar primordial black holes in low mass ratio binaries is open
The hunt for sub-solar primordial black holes in low mass ratio binaries is open
复制标题
在低质量比双星中寻找亚太阳原初黑洞的工作已经开始
DOI：
--
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
A. Tanasijczuk
中科院分区：
文献类型：
--
作者：
K. S. Phukon;G. Baltus;S. Caudill;S. Clesse;A. Depasse;M. Fays;H. Fong;S. Kapadia;R. Magee;A. Tanasijczuk
在LIGO/Virgo的第二次观测运行中，我们对一个太阳下质量黑洞和一个大于$2M_odot$的主分量的双黑洞合并进行了搜索。因此，我们的分析将之前的搜索扩展到了质量区域，该区域是由$[2-3] M_odot$附近的原始黑洞（PBH）的任何广泛质量分布中存在的峰值所激发的，该峰值来自QCD转变时的状态约化方程。发现四个候选事件通过每年2个的虚警率（FAR）阈值，尽管没有一个在统计上足够显著以被明确检测。我们首先推导出模型独立的限制PBH合并率假设一个空的搜索结果。然后，我们面对他们的两个最近的情况下，PBH可以构成的全部暗物质，解释LIGO/处女座合并和可能观察到的随机引力波背景NANOGrav。我们发现，这些模型仍然通过率的限制，并得出结论，O3和O 4观测运行的分析将是决定性的，以测试黑洞合并的原始起源的假设。
We perform a search for binary black hole mergers with one subsolar mass black hole and a primary component above $2 M_odot$ in the second observing run of LIGO/Virgo. Our analysis therefore extends previous searches into a mass region motivated by the presence of a peak in any broad mass distribution of primordial black holes (PBHs) around $[2-3] M_odot$ coming from the equation of state reduction at the QCD transition. Four candidate events are found passing a false alarm rate (FAR) threshold of 2 per year, although none are statistically significant enough for being clear detections. We first derive model independent limits on the PBH merging rates assuming a null result of the search. Then we confront them to two recent scenarios in which PBHs can constitute up to the totality of the Dark Matter, explain LIGO/Virgo mergers and the possible observation of a stochastic gravitational-wave background by NANOGrav. We find that these models still pass the rate limits and conclude that the analysis of the O3 and O4 observing runs will be decisive to test the hypothesis of a primordial origin of black hole mergers.