In this paper, we explore the formation of the mass-gap black hole-neutron star (mgBHNS)
merger detected in gravitational wave (GW) event, ie, GW230529, from the isolated binary …

In this work, we study the implications of GW230529 on gravity theories and the charge of
black holes. The GW230529, which was initially released in O4a, is most likely neutron-star …

Gravitational waves from inspiraling binary neutron stars provide unique access to
ultradense nuclear matter and offer the ability to constrain the currently unknown neutron …

Gravitational wave observations of black hole-neutron star binaries, particularly those where
the black hole has a lower mass compared to other observed systems, have the potential to …

The existence of compact stellar remnants in the mass range 2–5 M⊙ has long been
debated. This so-called lower-mass gap (LMG) was initially suggested by the lack of low …

Progress in gravitational-wave astronomy depends upon having sensitive detectors with
good data quality. Since the end of the LIGO-Virgo-KAGRA third Observing run in March …

Ultralight scalar fields can experience runaway “superradiant” amplification near spinning
black holes, resulting in a macroscopic “axion cloud,” which slowly dissipates via continuous …

Gravitational wave physics can probe theories that extend beyond general relativity.
Motivated by recent attention on the Kalb-Ramond field as a dark matter candidate, in this …

We study long-term evolution of the matter ejected in a black hole neutron star (BH–NS)
merger employing the results of a long-term numerical-relativity simulation and …

In this paper, we study the quasi-normal modes (QNMs) of a scalar field in the background of
a large class of quantum black holes that can be formed from gravitational collapse of a dust …