GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo during the Second Part of the Third Observing Run

Primordial Black Hole Merger Rate in f(R) Gravity

“…Through our analysis, we aim to illustrate the redshift evolution of the merger rate of PBHs. On the other hand, with the present sensitivity of GW detectors, they can detect merger events occurring within a co-moving volume of 50 Gpc 3 , equivalent to a redshift of approximately z ∼ 0.75 (Abbott et al 2021(Abbott et al , 2023. This raises an intriguing question of computing the redshift evolution of the merger rate of PBHs.…”

Constraints on Coasting Cosmological Models from Gravitational-wave Standard Sirens

“…For our tests, we used the publicly available GWTC-3 data (Abbott et al 2021b) and gwcosmo code (Gray et al 2020; for a more recent and enhanced version of the code, see Gray et al 2023) to rerun the Abbott et al (2023a) analysis using the statistical galaxy catalog method adapted to coasting cosmologies. 5 This means that we applied the following relationship between the d L luminosity distances of the GW sources and the z cosmological redshifts of their host galaxies:…”

“…Since achieving the first detection of gravitational waves (GWs) in 2015 (Abbott et al 2016), the Advanced LIGO (Aasi et al 2015), Advanced Virgo (Acernese et al 2015), and KAGRA (Akutsu et al 2021) detectors have completed three observing runs, detecting a total of 90 GW signals from coalescing compact binaries (Abbott et al 2021b). The detections included GW170817 (Abbott et al 2017a), a GW signal from a binary neutron star merger for which electromagnetic counterparts in various bands have also been found (Abbott et al 2017b).…”

Disentangling the Black Hole Mass Spectrum with Photometric Microlensing Surveys

“…Detectable emission from a BH is only produced through interaction with its environment. Massive, extragalactic BHs can be detected through a strong gravitational interaction with another object causing gravitational radiation (e.g., Abbott et al 2016Abbott et al , 2023a or through accretion causing electromagnetic (EM) radiation (e.g., Fabbiano 2006;Akiyama et al 2019;Event Horizon Telescope Collaboration et al 2022). Studies using gravitational-wave (GW) emission and EM observation can be effective for understanding the extragalactic BH population (e.g., Roulet & Zaldarriaga 2019;Abbott et al 2021bAbbott et al , 2023bEdelman et al 2023), provided that detection bias from observational selection effects is mitigated (Liotine et al 2023).…”