PoS - Proceedings of Science
Volume 474 - 2nd Training School and General Meeting of the COST Action COSMIC WISPers (CA21106) (COSMICWISPers2024) - Training School Talks
Binary pulsars as fuzzy dark matter detectors
P. Kůs*, D.L. Nacir and F. Urban
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Pre-published on: January 15, 2025
Published on:
Abstract
The ultra-light dark matter (ULDM) model is a compelling candidate for cosmological dark matter. If ULDM exists and interacts directly with ordinary matter, it leaves a distinct signature in pulsar timing data. Even in the absence of a detected signal, such data can impose stringent constraints on the ULDM parameter space. We present recent advances in using two independent methods—Bayesian analysis and machine learning—to assess the sensitivity of binary pulsars to ULDM. With these approaches, we extend the existing literature and further establish pulsars as detectors of ULDM. For simplicity, we focus solely on spin-0 ULDM model with linear dilatonic coupling to ordinary matter, but our methods can be straightforwardly extended to other types of ULDM.
DOI: https://doi.org/10.22323/1.474.0071
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