期刊
ASTROPHYSICAL JOURNAL
卷 931, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac5f03
关键词
-
资金
- NSF Research Traineeship program [DGE-1735359]
- National Science Foundation Graduate Research Fellowship Program [DGE-1746045]
- NASA through NASA Hubble Fellowship - Space Telescope Science Institute [HST-HF2-51455.001-A]
- Canadian Institute for Advanced Research (CIFAR)
- Government of Canada through the Department of Innovation, Science and Economic Development Canada
- Province of Ontario through the Ministry of Colleges and Universities
- NSF [PHY-2006645, PHY-2110507]
- Kavli Institute for Cosmological Physics through an endowment from the Kavli Foundation
- Marion and Stuart Rice Award
- NSF LIGO Laboratory - National Science Foundation
- National Science Foundation [PHY-0757058, PHY-0823459]
We analyze gravitational wave data and find evidence for two populations of compact objects, indicating the transition between neutron stars and black holes. We also uncover hints of a lower mass gap between the most massive neutron stars and the least massive black holes. This research has significant implications for understanding the properties and evolution of compact objects.
We search for features in the mass distribution of detected compact binary coalescences which signify the transition between neutron stars (NSs) and black holes (BHs). We analyze all gravitational-wave (GW) detections by the LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration (LVK) made through the end of the first half of the third observing run, and find clear evidence for two different populations of compact objects based solely on GW data. We confidently (99.3%) find a steepening relative to a single power law describing NSs and low-mass BHs below 2.4(-0.5)(+0.5)M(circle dot), which is consistent with many predictions for the maximum NS mass. We find suggestions of the purported lower mass gap between the most massive NSs and the least massive BHs, but are unable to conclusively resolve it with current data. If it exists, we find the lower mass gap's edges to lie at 2.2(-0.5)(+0.7)M(circle dot) and 6.0(-1.4)(+2.4)M(circle dot). We reexamine events that have been deemed exceptional by the LVK collaborations in the context of these features. We analyze GW190814 self-consistently in the context of the full population of compact binaries, finding support for its secondary to be either a NS or a lower mass gap object, consistent with previous claims. Our models are the first to accommodate this event, which is an outlier with respect to the binary BH population. We find that GW200105 and GW200115 probe the edges of, and may have components within, the lower mass gap. As future data improve global population models, the classification of these events will also improve.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据