Stellar-mass black holes and neutron stars represent extremes in gravity, density, and
magnetic fields. They therefore serve as key objects in the study of multiple frontiers of …

We review the formation and evolution of compact binary stars consisting of white dwarfs
(WDs), neutron stars (NSs), and black holes (BHs). Mergings of compact-star binaries are …

We perform an extensive analysis of the statistics of axion masses and interactions in
compactifications of type IIB string theory, and we show that black hole superradiance …

Aims. During the last~ 50 years, the population of black hole candidates in X-ray binaries
has increased considerably, with 59 Galactic objects being detected in transient low-mass X …

The process of superradiance can extract angular momentum and energy from astrophysical
black holes (BHs) to populate gravitationally bound states with an exponentially large …

With the advent of more sensitive all-sky instruments, the transient universe is being probed
in greater depth than ever before. Taking advantage of available resources, we have …

String theory suggests the simultaneous presence of many ultralight axions, possibly
populating each decade of mass down to the Hubble scale 10-33 eV. Conversely the …

We use dynamical mass measurements of 16 black holes in transient low-mass X-ray
binaries to infer the stellar black hole mass distribution in the parent population. We find that …

We perform a Bayesian analysis of the mass distribution of stellar-mass black holes using
the observed masses of 15 low-mass X-ray binary systems undergoing Roche lobe overflow …