The Constraining Capability of BNS Dark Sirens Observed by the LIGO Gravitational Wave Detector on the Hubble Constant

• Main Author: Chao, Xu
• Format: Journal Article
• Language: English
• Published: 10.10.2023
• Subjects: Physics - Cosmology and Nongalactic Astrophysics
• DOI: 10.48550/arxiv.2310.06294

The Hubble Constant observed at high redshift and low redshift are inconsistent, representing one of the urgent issues to be resolved in the field of cosmology. The discovery of gravitational waves opens a new window for addressing this problem. For instance, the GW170817 event, through the coordinated observation of electromagnetic and gravitational wave signals, allows for constraints to be imposed from a completely new perspective. However, the number of gravitational wave events where both electromagnetic and gravitational wave signals are observed simultaneously is too small, making it difficult to enhance the precision through statistical methods. In this paper, we use dark sirens as the subjects of study. Through the standard gravitational wave data simulation and the analysis process, we analyze the constraints a typical binary neutron star merger event can place on the Hubble Constant. We simulated a random event and found that it an provide an error of +0.04-0.05 for the Hubble Constant. By combining multiple events, this constraint can be improved.