LISA forecasts for quadratically coupled ultralight dark matter show competitive or superior sensitivity to terrestrial and astrophysical probes in selected mass windows, free of screening.
Probing stochastic ultralight dark matter with space-based gravitational-wave inter- ferometers
4 Pith papers cite this work. Polarity classification is still indexing.
4
Pith papers citing it
abstract
Ultralight particles are theoretically well-motivated dark matter candidates. In the vicinity of the solar system, these ultralight particles can be described as a superposition of plane waves, resulting in a stochastic field with sizable amplitude fluctuations on scales determined by the velocity dispersion of dark matter. In this work, we systematically investigate the sensitivity of space-based gravitational-wave interferometers to the stochastic ultralight dark matter (ULDM) field within the frequentist framework. We derive the projected sensitivity of a single detector using the time-delay interferometry. Our results show that space-based gravitational-wave interferometers have the potential to probe unconstrained regions in parameter space and improve the current limit on coupling strengths. Furthermore, we explore the sensitivity of a detector network and investigate the optimal configuration for ULDM detection. We introduce the overlap reduction function for ULDM, which quantifies the degree of correlation between the signals observed by different detectors. We find that the configuration, where the signals observed by two detectors are uncorrelated, is the optimal choice for ULDM detection due to a smaller chance of missing signal. This contrasts with the detection of stochastic gravitational-wave background, where the correlated configuration is preferred. Our results may provide useful insights for potential joint observations involving space-based gravitational-wave detectors like LISA and Taiji, as well as other ULDM detection networks operating in the coherence limit.
representative citing papers
Dynamic LISA/Taiji sensitivity curves exhibit 20% low-frequency variation and 70% directional source-count variation relative to static models, with quadrant patterns at low frequencies.
Monitor and Beacon TDI combinations reach g_aγ ~ 10^{-13} GeV^{-1} at high frequencies while Sagnac performs better at low frequencies, with ASTROD-GW probing axion-like dark matter masses down to 10^{-20} eV.
Numerical study with realistic LISA orbits and Bayesian methods finds that scalar ULDM signals can be discriminated from quasi-monochromatic GW signals.
citing papers explorer
-
Probing Quadratically Coupled Ultralight Dark Matter with the Laser Interferometer Space Antenna
LISA forecasts for quadratically coupled ultralight dark matter show competitive or superior sensitivity to terrestrial and astrophysical probes in selected mass windows, free of screening.
-
Construction of Sensitivity Curves for Dynamic LISA and Taiji
Dynamic LISA/Taiji sensitivity curves exhibit 20% low-frequency variation and 70% directional source-count variation relative to static models, with quadrant patterns at low frequencies.
-
Detectability of axion-like dark matter for different time-delay interferometry combinations in space-based gravitational wave detectors
Monitor and Beacon TDI combinations reach g_aγ ~ 10^{-13} GeV^{-1} at high frequencies while Sagnac performs better at low frequencies, with ASTROD-GW probing axion-like dark matter masses down to 10^{-20} eV.
-
Discriminating scalar ultralight dark matter from quasi-monochromatic gravitational waves in LISA
Numerical study with realistic LISA orbits and Bayesian methods finds that scalar ULDM signals can be discriminated from quasi-monochromatic GW signals.