New searches for continuous gravitational waves from seven fast pulsars

Abstract

We conduct searches for continuous gravitational waves from seven pulsars, that have not been targeted in continuous wave searches of Advanced LIGO data before. We target emission at exactly twice the rotation frequency of the pulsars and in a small band around such frequency. The former search assumes that the gravitational wave quadrupole is changing phase-locked with the rotation of the pulsar. The search over a range of frequencies allows for differential rotation between the component emitting the radio signal and the component emitting the gravitational waves, for example the crust or magnetosphere versus the core. Timing solutions derived from the Arecibo 327-MHz Drift-Scan Pulsar Survey (AO327) observations are used. No evidence of a signal is found and upper limits are set on the gravitational wave amplitude. For one of the pulsars we probe gravitational wave intrinsic amplitudes just a factor of 3.8 higher than the spin-down limit, assuming a canonical moment of inertia of $10^{38}$ kg m${}^2$. Our tightest ellipticity constraint is $1.5\times 10^{-8}$, which is a value well within the range of what a neutron star crust could support.

arXiv commentAccepted for Publication in The Astrophysical Journal

References in corpus (32)

• Data analysis of gravitational-wave signals from spinning neutron stars. I. The signal and its detection
• Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo
• Beating the spin-down limit on gravitational wave emission from the Crab pulsar
• Setting upper limits on the strength of periodic gravitational waves using the first science data from the GEO600 and LIGO detectors
• Maximum elastic deformations of relativistic stars
• Gravitational Waves from Neutron Stars: A Review
• The generalized F-statistic: multiple detectors and multiple GW pulsars
• All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data
• Gravitational waves from freely precessing neutron stars
• Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015-2017 LIGO Data
• Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars
• Evidence for a minimum ellipticity in millisecond pulsars
• Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run
• Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home
• All-sky Search for Continuous Gravitational Waves from Isolated Neutron Stars in the Early O3 LIGO Data
• Pulsar J1411+2551: A Low Mass New Double Neutron Star System
• Modelling neutron star mountains
• Results from the first all-sky search for continuous gravitational waves from small-ellipticity sources
• Diving below the spin-down limit: Constraints on gravitational waves from the energetic young pulsar PSR J0537-6910
• Search for Continuous Gravitational Waves from Scorpius X-1 in LIGO O2 Data
• Einstein@Home all-sky search for continuous gravitational waves in LIGO O2 public data
• Detection and timing of gamma-ray pulsations from the $707$ Hz pulsar J0952$-$0607
• First all-sky search for continuous gravitational-wave signals from unknown neutron stars in binary systems using Advanced LIGO data
• Results from an Einstein@Home search for continuous gravitational waves from Cassiopeia A, Vela Jr. and G347.3
• Search for Continuous Gravitational Waves from the Central Compact Objects in Supernova Remnants Cassiopeia A, Vela Jr. and G347.3-0.5
• Results from high-frequency all-sky search for continuous gravitational waves from small-ellipticity sources
• Directed searches for continuous gravitational waves from twelve supernova remnants in data from Advanced LIGO's second observing run
• Triaxially-deformed Freely-precessing Neutron Stars: Continuous electromagnetic and gravitational radiation
• Parameter choices and ranges for continuous gravitational wave searches for steadily spinning neutron stars
• The permanent ellipticity of the neutron star in PSR J1023+0038
• Search for continuous gravitational waves from Fomalhaut b in the second Advanced LIGO observing run with a hidden Markov model
• The Discovery of Six Recycled Pulsars from the Arecibo 327-MHz Drift-Scan Pulsar Survey

Cited by in corpus (23)

• Searches for Continuous-Wave Gravitational Radiation
• Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run
• Searches for continuous gravitational waves from neutron stars: A twenty-year retrospective
• Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
• Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data
• Status and perspectives of Continuous Gravitational Wave searches
• The MPIfR-MeerKAT Galactic Plane survey I -- System setup and early results
• The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources
• Continuous gravitational waves from Galactic neutron stars: demography, detectability and prospects
• Gravitational wave probes of particle dark matter: a review
• Search for continuous gravitational waves from known pulsars in the first part of the fourth LIGO-Virgo-KAGRA observing run
• Results from an Einstein@Home search for continuous gravitational waves from G347.3 at low frequencies in LIGO O2 data
• Bayesian $\mathcal{F}$-statistic-based parameter estimation of continuous gravitational waves from known pulsars
• Graphics processing unit implementation of the F-statistic for continuous gravitational wave searches
• Anisotropic neutron star crust, solar system mountains, and gravitational waves
• Searching for continuous gravitational waves from slowly spinning neutron stars with DECIGO, Big Bang Observer, Einstein Telescope and Cosmic Explorer
• New semicoherent targeted search for continuous gravitational waves from pulsars in binary systems
• Einstein@Home Searches for Gamma-ray Pulsars in the Inner Galaxy
• Results from an Einstein@Home search for continuous gravitational waves from Cassiopeia A and Vela Jr. using LIGO O2 data
• Searching for continuous gravitational waves from highly deformed compact objects with DECIGO
• Search of nearby resolved neutron stars among optical sources
• Narrowband searches for continuous gravitational waves from known pulsars in the first two parts of the fourth LIGO--Virgo--KAGRA observing run
• Constraints on r-modes and mountains on millisecond neutron stars in binary systems