Now that detection of gravitational-wave signals from the coalescence of extra-galactic
compact binary star mergers has become nearly routine, it is intriguing to consider other …

We present results of an all-sky search for continuous gravitational waves (CWs), which can
be produced by fast spinning neutron stars with an asymmetry around their rotation axis …

We present results of an all-sky search for continuous gravitational waves which can be
produced by spinning neutron stars with an asymmetry around their rotation axis, using data …

This paper describes the first all-sky search for long-duration, quasimonochromatic
gravitational-wave signals emitted by ultralight scalar boson clouds around spinning black …

Superradiance can trigger the formation of an ultralight boson cloud around a spinning black
hole. Once formed, the boson cloud is expected to emit a nearly periodic, long-duration …

We report on an all-sky search for continuous gravitational waves in the frequency band 20–
2000 Hz and with a frequency time derivative in the range of [− 1.0,+ 0.1]× 10− 8 Hz/s. Such …

Gravitational wave astronomy opened dramatically in September 2015 with the LIGO
discovery of a distant and massive binary black hole coalescence. The more recent …

Searches are under way in Advanced LIGO and Virgo data for persistent gravitational waves
from continuous sources, eg rapidly rotating galactic neutron stars, and stochastic sources …

Non-axisymmetrical deformations of the crust on rapidly rotating neutron stars are one of the
main targets of searches for continuous gravitational waves. The maximum ellipticity, or …

Ultralight bosons can form large clouds around stellar-mass black holes via the
superradiance instability. Through processes such as annihilation, these bosons can source …