期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 912, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/2041-8213/abf502
关键词
-
资金
- Australian Research Council (ARC) [DP180103155]
- Research Committee of the Chinese University of Hong Kong [4053406]
- la Caixa Foundation [100010434]
- European Union [847648]
- ARC [DP180103155, FT160100112]
- ARC Centre of Excellence [CE170100004]
- National Science Foundation [PHY-0757058, PHY0823459]
- NSF CIT cluster
- CUHK Central High Performance Computing Cluster
- Croucher Foundation of Hong Kong
- [LCF/BQ/PI20/11760016]
The joint observation of gravitational-wave and electromagnetic signal from the binary neutron star merger GW170817 provided a new independent measurement of the Hubble constant, although with some uncertainty. Future observations of similar sources with a network of detectors could improve the precision of the measurements, but are currently hindered by degeneracies in the gravitational-wave signal.
The joint observation of the gravitational-wave (GW) and electromagnetic (EM) signal from the binary neutron-star merger GW170817 allowed for a new independent measurement of the Hubble constant H (0), albeit with an uncertainty of about 15% at 1 sigma. Observations of similar sources with a network of future detectors will allow for more precise measurements of H (0). These, however, are currently largely limited by the intrinsic degeneracy between the luminosity distance and the inclination of the source in the GW signal. We show that the higher-order modes in gravitational waves can be used to break this degeneracy in astrophysical parameter estimation in both the inspiral and post-merger phases of a neutron star merger. We show that for systems at distances similar to GW170817, this method enables percent-level measurements of H (0) with a single detection. This would permit the study of time variations and spatial anisotropies of H (0) with unprecedented precision. We investigate how different network configurations affect measurements of H (0), and discuss the implications in terms of science drivers for the proposed 2.5- and third-generation GW detectors. Finally, we show that the precision of H (0) measured with these future observatories will be solely limited by redshift measurements of EM counterparts.
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