Searches for Continuous-Wave Gravitational Radiation

Abstract

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 potential gravitational wave signatures. Here we examine the prospects for discovery of continuous gravitational waves from fast-spinning neutron stars in our own galaxy and from more exotic sources. Potential continuous-wave sources are reviewed, search methodologies and results presented and prospects for imminent discovery discussed.

Invited review article for Living Reviews in Relativity. 176 pages, 39 figures

References in corpus (180)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Multi-messenger Observations of a Binary Neutron Star Merger
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• Advanced LIGO
• GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
• Exploring the Sensitivity of Next Generation Gravitational Wave Detectors
• TEMPO2, a new pulsar timing package. I: Overview
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Optical Images of an Exosolar Planet 25 Light Years from Earth
• Observation of gravitational waves from two neutron star-black hole coalescences
• Thermonuclear (type-I) X-ray bursts observed by the Rossi X-ray Timing Explorer
• A Radio Pulsar/X-ray Binary Link
• Discovering the QCD Axion with Black Holes and Gravitational Waves
• The Breaking Strain of Neutron Star Crust and Gravitational Waves
• Gravitational wave searches for ultralight bosons with LIGO and LISA
• The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant
• 45 Years of Rotation of the Crab Pulsar
• A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
• Search for post-merger gravitational waves from the remnant of the binary neutron star merger GW170817
• Maximum elastic deformations of compact stars with exotic equations of state
• Stochastic and resolvable gravitational waves from ultralight bosons
• Detecting gravitational wave emission from the known accreting neutron stars
• HESS VHE Gamma-Ray Sources Without Identified Counterparts
• Upper limits on gravitational wave emission from 78 radio pulsars
• The Youngest Galactic Supernova Remnant: G1.9+0.3
• Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. I. The Millisecond Pulsar X-ray Data Set
• Discovery of a radio emitting neutron star with an ultra-long spin period of 76 seconds
• Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. II. Emission from Hot Spots on a Rapidly Rotating Neutron Star
• Predicting the Starquakes in PSR J0537-6910
• All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data
• Three-dimensional Models of Core-collapse Supernovae From Low-mass Progenitors With Implications for Crab
• Directional limits on persistent gravitational waves from Advanced LIGO's first observing run
• Evolution of a buried magnetic field in the central compact object neutron stars
• The Einstein@Home search for periodic gravitational waves in LIGO S4 data
• Machine-learning non-stationary noise out of gravitational wave detectors
• Pulsar braking and the P-Pdot diagram
• Searching for gravitational waves from Cassiopeia A with LIGO
• Optical spectroscopy and demographics of redback millisecond pulsar binaries
• Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform
• Recent searches for continuous gravitational waves
• How to adapt broad-band gravitational-wave searches for r-modes
• The Spin Distribution of Fast Spinning Neutron Stars in Low Mass X-Ray Binaries: Evidence for Two Sub-Populations
• Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
• New long-term braking index measurements for glitching pulsars using a glitch-template method
• First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data
• Gravitational wave signatures of ultralight vector bosons from black hole superradiance
• A first search for a stochastic gravitational-wave background from ultralight bosons
• Pulsar spin-down: the glitch-dominated rotation of PSR J0537-6910
• Constraints on ultralight scalar bosons within black hole spin measurements from LIGO-Virgo's GWTC-2
• On the Expansion Rate, Age, and Distance of the Supernova Remnant G266.2-1.2 (Vela Jr.)
• New Phase-coherent Measurements of Pulsar Braking Indices
• Spin-Down of Radio Millisecond Pulsars at Genesis
• Long gravitational-wave transients and associated detection strategies for a network of terrestrial interferometers
• Detecting gravitational waves from mountains on neutron stars in the Advanced Detector Era
• LOFAR discovery of the fastest-spinning millisecond pulsar in the Galactic field
• Postprocessing methods used in the search for continuous gravitational-wave signals from the Galactic Center
• Template-based searches for gravitational waves: efficient lattice covering of flat parameter spaces
• Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run
• Search method for long-duration gravitational-wave transients from neutron stars
• Magnetic field growth in young glitching pulsars with a braking index
• The Parkes pulsar timing array second data release: Timing analysis
• Detecting Beyond-Einstein Polarizations of Continuous Gravitational Waves
• The impact of glitches on young pulsar rotational evolution
• The braking index of millisecond magnetars
• Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves
• NS 1987A in SN 1987A
• All-sky search in early O3 LIGO data for continuous gravitational-wave signals from unknown neutron stars in binary systems
• The cross-correlation search for periodic gravitational waves
• All-sky Search for Continuous Gravitational Waves from Isolated Neutron Stars in the Early O3 LIGO Data
• First all-sky search for continuous gravitational waves from unknown sources in binary systems
• R-mode frequencies of slowly rotating relativistic neutron stars with realistic equations of state
• Rotational evolution of young pulsars due to superfluid decoupling
• Directed searches for continuous gravitational waves from binary systems: parameter-space metrics and optimal Scorpius X-1 sensitivity
• Implications of an r-mode in XTE J1751-305: Mass, radius and spin evolution
• A Catalog of Diffuse X-ray-Emitting Features within 20 pc of Sgr A*: Twenty Pulsar Wind Nebulae?
• First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data
• Search methods for continuous gravitational-wave signals from unknown sources in the advanced-detector era
• Gravitational waves from Sco X-1: A comparison of search methods and prospects for detection with advanced detectors
• Blandford's Argument: The Strongest Continuous Gravitational Wave Signal
• Central Compact Objects in Supernova Remnants
• Parameter-space metric of semicoherent searches for continuous gravitational waves
• A directed search for gravitational waves from Scorpius X-1 with initial LIGO
• On Detecting Millisecond Pulsars at the Galactic Center
• Numerical simulations of the magnetorotational instability in protoneutron stars: I. Influence of buoyancy
• Discovery of a Neutron Star Oscillation Mode During a Superburst
• Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data
• Deep-Learning Continuous Gravitational Waves: Multiple detectors and realistic noise
• Hidden Markov model tracking of continuous gravitational waves from a binary neutron star with wandering spin. II. Binary orbital phase tracking
• New HST data and modeling reveal a massive planetesimal collision around Fomalhaut
• Search for Continuous Gravitational Waves from Scorpius X-1 in LIGO O2 Data
• Parameter-space correlations of the optimal statistic for continuous gravitational-wave detection
• Excitation of a nonradial mode in a millisecond X-ray pulsar XTE J1751-305
• Model-Based Cross-Correlation Search for Gravitational Waves from Scorpius X-1
• Lattice template placement for coherent all-sky searches for gravitational-wave pulsars
• Detection of periodic gravitational wave sources by Hough transform in the frequency and spin down plane
• Observations of the 599 Hz Accreting X-ray Pulsar IGR J00291+5934 during the 2004 Outburst and in Quiescence
• A method for narrow-band searches of continuous gravitational wave signals
• Return of the Big Glitcher: NICER timing and glitches of PSR J0537-6910
• Gravitational wave emission from oscillating millisecond pulsars
• Neutron Star Crust Can Support A Large Ellipticity
• The Adaptive Transient Hough method for long-duration gravitational wave transients
• The glitches and rotational history of the highly energetic young pulsar PSR J0537$-$6910
• Discovery of a Highly Energetic X-ray Pulsar Powering HESS J1813-178 in the Young Supernova Remnant G12.82-0.02
• An Einstein@home search for continuous gravitational waves from Cassiopeia A
• Results of the deepest all-sky survey for continuous gravitational waves on LIGO S6 data running on the Einstein@Home volunteer distributed computing project
• Results from high-frequency all-sky search for continuous gravitational waves from small-ellipticity sources
• The illusion of neutron star magnetic field estimates
• The Braking Index of a Radio-quiet Gamma-ray Pulsar
• The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
• Implementation of barycentric resampling for continuous wave searches in gravitational wave data
• Search for gravitational waves from five low mass X-ray binaries in the second Advanced LIGO observing run with an improved hidden Markov model
• Mountain formation by repeated, inhomogeneous crustal failure in a neutron star
• Searches for continuous gravitational waves from Scorpius X-1 and XTE J1751-305 in LIGO's sixth science run
• Transient gravitational waves from pulsar post-glitch recoveries
• Cross-correlation search for continuous gravitational waves from a compact object in SNR 1987A in LIGO Science Run 5
• A new veto for continuous gravitational wave searches
• A fast search strategy for gravitational waves from low-mass X-ray binaries
• Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data
• Adaptive clustering procedure for continuous gravitational wave searches
• Gravitational Waves from Pulsars and Their Braking Indices: The Role of a Time Dependent Magnetic Ellipticity
• X-ray bounds on cooling, composition, and magnetic field of the Cassiopeia A neutron star and young central compact objects
• Deep learning for clustering of continuous gravitational wave candidates II: identification of low-SNR candidates
• Gravitational-Wave and X-ray Probes of the Neutron Star Equation of State
• Hidden Markov model tracking of continuous gravitational waves from a neutron star with wandering spin. III. Rotational phase tracking
• Triaxially-deformed Freely-precessing Neutron Stars: Continuous electromagnetic and gravitational radiation
• Loosely coherent search in LIGO O1 data for continuous gravitational waves from Terzan 5 and the galactic center
• Additional evidence for a pulsar wind nebula in the heart of SN 1987A from multi-epoch X-ray data and MHD modeling
• PyFstat: a Python package for continuous gravitational-wave data analysis
• BinarySkyHough: a new method to search for continuous gravitational waves from unknown neutron stars in binary systems
• Empirically extending the range of validity of parameter-space metrics for all-sky searches for gravitational-wave pulsars
• Search strategies for long gravitational-wave transients: hidden Markov model tracking and seedless clustering
• Improved Hough search for gravitational wave pulsars
• The permanent ellipticity of the neutron star in PSR J1023+0038
• A short gamma-ray burst from a proto-magnetar remnant
• Prospects for detecting transient quasi-monochromatic gravitational waves from glitching pulsars with current and future detectors
• Pulsar death line revisited -- II. 'The death valley'
• The companion candidate near Fomalhaut - a background neutron star?
• Radio Detection of PSR J1813-1749 in HESS J1813-178: The Most Scattered Pulsar Known
• Inferring neutron star properties with continuous gravitational waves
• Stochastic gravitational-wave background searches and constraints on neutron-star ellipticity
• Optimising the choice of analysis method for all-sky searches for continuous gravitational waves with Einstein@Home
• Gravitational radiation from thermal mountains on accreting neutron stars: sources of temperature non-axisymmetry
• First Constraining Upper Limits on Gravitational Wave Emission from NS 1987A in SNR 1987A
• Settling accretion on to isolated neutron stars from interstellar medium
• Pulsar death line revisited -- I. Almost vacuum gap
• Fully coherent follow-up of continuous gravitational-wave candidates: an application to Einstein@Home results
• Measuring neutron-star distances and properties with gravitational-wave parallax
• Relaxation by thermal conduction of a magnetically confined mountain on an accreting neutron star
• Line-robust statistics for continuous gravitational waves: safety in the case of unequal detector sensitivities
• Improved short-segment detection statistic for continuous gravitational waves
• Search setup for long-duration transient gravitational waves from glitching pulsars during LIGO-Virgo third observing run
• Time-frequency track distance for comparing continuous gravitational wave signals
• Tracking continuous gravitational waves from a neutron star at once and twice the spin frequency with a hidden Markov model
• All-sky, narrowband, gravitational-wave radiometry with folded data
• Continuous gravitational wave emission from neutron stars with pinned superfluids in the core
• Validating continuous gravitational-wave candidates from a semicoherent search using Doppler modulation and an effective point spread function
• Density-clustering of continuous gravitational wave candidates from large surveys
• A Test of the Neutron Star Hypothesis for Fomalhaut b
• All-sky search of NAUTILUS data
• Banks of templates for directed searches of gravitational waves from spinning neutron stars
• A ${\chi }^2$ veto for continuous gravitational wave searches
• Spin evolution of neutron stars in two modes: implication for millisecond pulsars
• The minimum rotation period of millisecond pulsars
• Pulse Frequency Fluctuations of Persistent Accretion Powered Pulsars
• Improved all-sky search method for continuous gravitational waves from unknown neutron stars in binary systems
• Opportunistic search for continuous gravitational waves from compact objects in long-period binaries
• Search for continuous gravitational waves from HESS~J1427-608 with a hidden Markov model
• Geometric Approach to Analytic Marginalisation of the Likelihood Ratio for Continuous Gravitational Wave Searches
• Impact of signal clusters in wide-band searches for continuous gravitational waves
• Inferring properties of neutron stars born in short gamma-ray bursts with a plerion-like X-ray plateau
• Directed search for continuous gravitational waves from the possible kilonova remnant G4.8+6.2
• Constraints on r-modes and mountains on millisecond neutron stars in binary systems

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