Hellings-Downs curve deformed by ultralight vector dark matter
Cosmology and Nongalactic Astrophysics
2023-07-25 v1 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
Pulsar timing arrays (PTAs) provide a way to detect gravitational waves (GWs) at nanohertz frequencies. To ensure the detection of GWs, observational data must exhibit the Hellings-Downs angular correlation. It is also known that PTAs can probe ultralight dark matter. In this paper, we consider possible contamination of the Hellings-Downs angular correlation by the ultralight dark matter. We find that ultralight vector dark matter can give rise to the deformation of the Hellings-Downs correlation curve. Thus, the Hellings-Downs correlation curve could contain information on ultralight dark matter with a spin.
Keywords
Cite
@article{arxiv.2307.12624,
title = {Hellings-Downs curve deformed by ultralight vector dark matter},
author = {Hidetoshi Omiya and Kimihiro Nomura and Jiro Soda},
journal= {arXiv preprint arXiv:2307.12624},
year = {2023}
}
Comments
13pages, 3 figures