On the Gravitational Wave Counterpart to a Gamma-ray Galactic Center Signal from Millisecond Pulsars
arXiv:2409.12271 · doi:10.1103/PhysRevD.110.123036
Abstract
The new tools of gravitational wave and multi-messenger astronomy allow for the study of astrophysical phenomenon in new ways and enables light to be shed on some of the longest-enduring mysteries of high-energy astrophysics. Among the latter stands the Galactic center gamma-ray excess, associated with a source whose nature could be annihilating dark matter or a yet-unresolved population of millisecond pulsars (MSPs). MSPs are most likely asymmetric about their axis of rotation, and are thus thought to also source quasi-monochromatic gravitational waves, that dark matter processes would not emit. Using statistical methods, we simulate realistic MSP population samples with differing morphology and moment of inertia, that could give rise to the gamma-ray excess, and we compute the corresponding gravitational wave signal amplitude and frequency. We find that the gravitational wave signal frequency likely ranges between 200 and 1400 Hz, and that the collective dimensionless strain from the center of the Galaxy has an amplitude between and , thus most likely beyond current and near-term detectors, unless the unresolved MSPs are extraordinarily gamma-ray dim.
arXiv comment19 pages, 11 figures
References in corpus (31)
- emcee: The MCMC Hammer
- A Universal Density Profile from Hierarchical Clustering
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- The ATNF Pulsar Catalogue
- Sensitivity Studies for Third-Generation Gravitational Wave Observatories
- Binary and Millisecond Pulsars
- On The Origin Of The Gamma Rays From The Galactic Center
- The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
- Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
- Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
- Sensitivity and Performance of the Advanced LIGO Detectors in the Third Observing Run
- Galactic Bulge Preferred Over Dark Matter for the Galactic Center Gamma-Ray Excess
- Review of the Advanced LIGO gravitational wave observatories leading to observing run four
- Millisecond pulsar interpretation of the Galactic center gamma-ray excess
- Evidence for a minimum ellipticity in millisecond pulsars
- Strong Evidence that the Galactic Bulge is Shining in Gamma Rays
- Foreground Mismodeling and the Point Source Explanation of the Fermi Galactic Center Excess
- Spurious Point Source Signals in the Galactic Center Excess
- The Enigmatic Galactic Center Excess: Spurious Point Sources and Signal Mismodeling
- Millisecond Pulsars from Accretion Induced Collapse as the Origin of the Galactic Centre Gamma-ray Excess Signal
- SkyFACT: High-dimensional modeling of gamma-ray emission with adaptive templates and penalized likelihoods
- Millisecond pulsar origin of the Galactic center excess and extended gamma-ray emission from Andromeda - a closer look
- Population syntheses of millisecond pulsars from the Galactic Disk and Bulge
- Les Houches Lectures on Indirect Detection of Dark Matter
- Comparing the Galactic Bulge and Galactic Disk Millisecond Pulsars
- Prospects for improving the sensitivity of the cryogenic gravitational wave detector KAGRA
- A strange star scenario for the formation of isolated millisecond pulsars
- 8 in 10 Stars in the Milky Way Bulge Experience Stellar Encounters Within 1000 AU in a Gigayear
- Probing the Fermi-LAT GeV excess with gravitational waves
- Probing the pulsar explanation of the Galactic-Center GeV excess using continuous gravitational-wave searches
- Constraining the ellipticity of millisecond pulsars with observed spin-down rates