Upper Limits on Gravitational Waves from Scorpius X-1 from a Model-Based Cross-Correlation Search in Advanced LIGO Data

Abstract

We present the results of a semicoherent search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1, using data from the first Advanced LIGO observing run. The search method uses details of the modelled, parametrized continuous signal to combine coherently data separated by less than a specified coherence time, which can be adjusted to trade off sensitivity against computational cost. A search was conducted over the frequency range from 25 Hz to 2000 Hz, spanning the current observationally-constrained range of the binary orbital parameters. No significant detection candidates were found, and frequency-dependent upper limits were set using a combination of sensitivity estimates and simulated signal injections. The most stringent upper limit was set at 175 Hz, with comparable limits set across the most sensitive frequency range from 100 Hz to 200 Hz. At this frequency, the 95 pct upper limit on signal amplitude h0 is 2.3e-25 marginalized over the unknown inclination angle of the neutron star's spin, and 8.03e-26 assuming the best orientation (which results in circularly polarized gravitational waves). These limits are a factor of 3-4 stronger than those set by other analyses of the same data, and a factor of about 7 stronger than the best upper limits set using initial LIGO data. In the vicinity of 100 Hz, the limits are a factor of between 1.2 and 3.5 above the predictions of the torque balance model, depending on inclination angle, if the most likely inclination angle of 44 degrees is assumed, they are within a factor of 1.7.

arXiv comment19 pages, 8 figures. Formatted with AASTeX 6.1. Published in The Astrophysical Journal

References in corpus (44)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• Characterization of the LIGO detectors during their sixth science run
• Binary Black Hole Mergers in the first Advanced LIGO Observing Run
• Data analysis of gravitational-wave signals from spinning neutron stars. I. The signal and its detection
• Gravitational Radiation and Rotation of Accreting Neutron Stars
• Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run
• Detecting gravitational wave emission from the known accreting neutron stars
• Upper limits on the rates of binary neutron star and neutron-star--black-hole mergers from Advanced LIGO's first observing run
• First search for gravitational waves from known pulsars with Advanced LIGO
• The mass donor of Scorpius X-1 revealed
• Gravitational waves from known pulsars: results from the initial detector era
• Coherent searches for periodic gravitational waves from unknown isolated sources and Scorpius X-1: results from the second LIGO science run
• Sco X-1: The Evolution and Nature of the Twin Compact Radio Lobes
• First search for gravitational waves from the youngest known neutron star
• Directional limits on persistent gravitational waves from Advanced LIGO's first observing run
• Searching for gravitational waves from Cassiopeia A with LIGO
• Upper limit map of a background of gravitational waves
• Directional limits on persistent gravitational waves using LIGO S5 science data
• All-sky search for short gravitational-wave bursts in the first Advanced LIGO run
• A radiometer for stochastic gravitational waves
• Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model
• Hidden Markov model tracking of continuous gravitational waves from a neutron star with wandering spin
• Detecting gravitational waves from mountains on neutron stars in the Advanced Detector Era
• Search for Gravitational Waves Associated with Gamma-Ray Bursts During the First Advanced LIGO Observing Run and Implications for the Origin of GRB 150906B
• Searches for continuous gravitational waves from nine young supernova remnants
• The cross-correlation search for periodic gravitational waves
• First all-sky search for continuous gravitational waves from unknown sources in binary systems
• Directed searches for continuous gravitational waves from binary systems: parameter-space metrics and optimal Scorpius X-1 sensitivity
• Gravitational waves from Sco X-1: A comparison of search methods and prospects for detection with advanced detectors
• A directed search for gravitational waves from Scorpius X-1 with initial LIGO
• An all-sky search algorithm for continuous gravitational waves from spinning neutron stars in binary systems
• Comprehensive All-sky Search for Periodic Gravitational Waves in the Sixth Science Run LIGO Data
• Search for dark matter produced in association with a Higgs boson decaying to two bottom quarks in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Precision ephemerides for gravitational-wave searches: I. Sco X-1
• First low frequency all-sky search for continuous gravitational wave signals
• Implementation of barycentric resampling for continuous wave searches in gravitational wave data
• Searches for continuous gravitational waves from Scorpius X-1 and XTE J1751-305 in LIGO's sixth science run
• Implementation of the frequency-modulated sideband search method for gravitational waves from low mass X-ray binaries
• A semi-coherent search strategy for known continuous wave sources in binary systems
• A fast search strategy for gravitational waves from low-mass X-ray binaries
• Tuning into Scorpius X-1: adapting a continuous gravitational-wave search for a known binary system
• Gravitational waves from rapidly rotating neutron stars
• Bayesian versus frequentist upper limits

Cited by in corpus (47)

• All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data
• Searches for Continuous-Wave Gravitational Radiation
• Recent searches for continuous gravitational waves
• Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo's first three observing runs
• Astromaterial Science and Nuclear Pasta
• Continuous gravitational waves from neutron stars: current status and prospects
• Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run
• Fast and Accurate Sensitivity Estimation for Continuous-Gravitational-Wave Searches
• Searches for continuous gravitational waves from neutron stars: A twenty-year retrospective
• Directional limits on persistent gravitational waves using data from Advanced LIGO's first two observing runs
• Search for gravitational waves from Scorpius X-1 in the second Advanced LIGO observing run with an improved hidden Markov model
• Search methods for continuous gravitational-wave signals from unknown sources in the advanced-detector era
• Modelling neutron star mountains
• Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data
• A semi-coherent analysis method to search for continuous gravitational waves emitted by ultra-light boson clouds around spinning black holes
• Status and perspectives of Continuous Gravitational Wave searches
• Long-lived inverse chirp signals from core collapse in massive scalar-tensor gravity
• A new data analysis framework for the search of continuous gravitational wave signals
• Search for Continuous Gravitational Waves from Scorpius X-1 in LIGO O2 Data
• Modelling neutron star mountains in relativity
• Hierarchical multi-stage MCMC follow-up of continuous gravitational wave candidates
• Implementing a semicoherent search for continuous gravitational waves using optimally-constructed template banks
• Neutron Star Crust Can Support A Large Ellipticity
• Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO 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
• Core collapse in massive scalar-tensor gravity
• Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data
• Precision ephemerides for gravitational-wave searches -- III. Revised system parameters of Sco X-1
• Hidden Markov model tracking of continuous gravitational waves from a neutron star with wandering spin. III. Rotational phase tracking
• BinarySkyHough: a new method to search for continuous gravitational waves from unknown neutron stars in binary systems
• Population Synthesis of Accreting Neutron Stars Emitting Gravitational Waves
• Deep exploration for continuous gravitational waves at 171--172 Hz in LIGO second observing run data
• Search for continuous gravitational waves from Fomalhaut b in the second Advanced LIGO observing run with a hidden Markov model
• Resampling to accelerate cross-correlation searches for continuous gravitational waves from binary systems
• Neutron Star Structure in the Minimal Gravitational Standard-Model Extension and the Implication to Continuous Gravitational Waves
• Magnetically confined mountains on accreting neutron stars with multipole magnetic fields
• Template Lattices for a Cross-Correlation Search for Gravitational Waves from Scorpius X-1
• Gravitational waves from neutron-star mountains
• Search for Gravitational Waves from Scorpius X-1 in LIGO O3 Data With Corrected Orbital Ephemeris
• Precision Ephemerides for Gravitational-wave Searches -- IV: Corrected and refined ephemeris for Scorpius X-1
• Eclipses of continuous gravitational waves as a probe of stellar structure
• Anisotropic neutron star crust, solar system mountains, and gravitational waves
• Implementation of a new weave-based search pipeline for continuous gravitational waves from known binary systems
• Gravitational-wave searches in the era of Advanced LIGO and Virgo
• How much spin wandering can continuous gravitational wave search algorithms handle?
• Deep searches for X-ray pulsations from Scorpius X-1 and Cygnus X-2 in support of continuous gravitational wave searches
• Applicability of multi-component study on Bayesian searches for targeted anisotropic stochastic gravitational-wave background