A frequency resolved atlas of the sky in continuous gravitational waves

Abstract

We present the first atlas of the continuous gravitational wave sky, produced using LIGO O3a public data. For each 0.045 Hz frequency band and every point on the sky the atlas provides gravitational wave amplitude upper limits, signal-to-noise ratios (SNR) and frequencies where the search measures the maximum SNR. The approximately top 1.5% of the atlas results are reanalyzed with a series of more sensitive searches with the purpose of finding high SNR long coherence signals from isolated neutron stars. However, these searches do not reveal the presence of such signals. The results presented in the atlas are produced with the Falcon pipeline and cover nearly monochromatic gravitational-wave signals in the 500-1000 Hz band, with up to +/- 5e-11 Hz/s frequency derivative. The Falcon pipeline computes loosely coherent power estimates to search data using a succession of coherence lengths. For this search we used 6 months of data, started with a 12 hour coherence length and progressed to 6 days. Compared to the most sensitive results previously published (also produced with the Falcon pipeline) our upper limits are 50% more constraining. Neutron stars with ellipticity of 1e-8 can be detected up to 150 pc away, while allowing for a large fraction of the stars' energy to be lost through non-gravitational channels. These results are within an order of magnitude of the _minimum_ neutron star ellipticity of 1e-9 suggested in [33].

References in corpus (23)

• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• The James Webb Space Telescope
• LIGO Detector Characterization in the Second and Third Observing Runs
• How to adapt broad-band gravitational-wave searches for r-modes
• Characterizing the continuous gravitational-wave signal from boson clouds around Galactic isolated black holes
• All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data
• All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data
• Detecting gravitational waves from mountains on neutron stars in the Advanced Detector Era
• All-sky Search for Continuous Gravitational Waves from Isolated Neutron Stars in the Early O3 LIGO Data
• Modelling neutron star mountains
• Probing planetary-mass primordial black holes with continuous gravitational waves
• Results from the first all-sky search for continuous gravitational waves from small-ellipticity sources
• Modelling neutron star mountains in relativity
• Search of the Early O3 LIGO Data for Continuous Gravitational Waves from the Cassiopeia A and Vela Jr. Supernova Remnants
• Search for Continuous Gravitational Waves from the Central Compact Objects in Supernova Remnants Cassiopeia A, Vela Jr. and G347.3-0.5
• All-sky, all-frequency directional search for persistent gravitational-waves from Advanced LIGO's and Advanced Virgo's first three observing runs
• Results from high-frequency all-sky search for continuous gravitational waves from small-ellipticity sources
• Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK)
• Identification and removal of non-Gaussian noise transients for gravitational wave searches
• The search for continuous gravitational waves from small-ellipticity sources at low frequencies
• The Fourier Transform of the Continuous Gravitational Wave Signal
• Constraints on r-modes and mountains on millisecond neutron stars in binary systems

Cited by in corpus (14)

• Searches for Continuous-Wave Gravitational Radiation
• The Science of the Einstein Telescope
• Searches for continuous gravitational waves from neutron stars: A twenty-year retrospective
• Continuous gravitational waves from Galactic neutron stars: demography, detectability and prospects
• Early release of the expanded atlas of the sky in continuous gravitational waves
• Bayesian $\mathcal{F}$-statistic-based parameter estimation of continuous gravitational waves from known pulsars
• Anisotropic neutron star crust, solar system mountains, and gravitational waves
• New semicoherent targeted search for continuous gravitational waves from pulsars in binary systems
• Expanded atlas of the sky in continuous gravitational waves
• Efficient representations of upper limits and confidence intervals for experimental data
• Search for continuous gravitational waves from unknown neutron stars in binary systems with long orbital periods in O3 data
• Results from an Einstein@Home search for continuous gravitational waves from Cassiopeia A and Vela Jr. using LIGO O2 data
• Constraining the abundance of spinning deformed Galactic compact objects with continuous gravitational waves
• Search of nearby resolved neutron stars among optical sources