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arxiv: 2306.16228 · v2 · pith:IXWFLB5H · submitted 2023-06-28 · astro-ph.HE · astro-ph.CO· astro-ph.GA· gr-qc· hep-ph

The second data release from the European Pulsar Timing Array: VI. Challenging the ultralight dark matter paradigm

Clemente Smarra , Boris Goncharov , Enrico Barausse , J. Antoniadis , S. Babak , A.-S. Bak Nielsen , C. G. Bassa , A. Berthereau
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M. Bonetti E. Bortolas P. R. Brook M. Burgay R. N. Caballero A. Chalumeau D. J. Champion S. Chanlaridis S. Chen I. Cognard G. Desvignes M. Falxa R. D. Ferdman A. Franchini J. R. Gair E. Graikou J.-M. Grie L. Guillemot Y. J. Guo H. Hu F. Iraci D. Izquierdo-Villalba J. Jang J. Jawor G. H. Janssen A. Jessner R. Karuppusamy E. F. Keane M. J. Keith M. Kramer M. A. Krishnakumar K. Lackeos K. J. Lee K. Liu Y. Liu A. G. Lyne J. W. McKee R. A. Main M. B. Mickaliger I. C. Ni\c{t}u A. Parthasarathy B. B. P. Perera D. Perrodin A. Petiteau N. K. Porayko A. Possenti H. Quelquejay Leclere A. Samajdar S. A. Sanidas A. Sesana G. Shaifullah L. Speri R. Spiewak B. W. Stappers S. C. Susarla G. Theureau C. Tiburzi E. van der Wateren A. Vecchio V. Venkatraman Krishnan J. Wang L. Wang Z. Wu
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keywords matterdarktimingarraylesssimpulsarultralightdata
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Pulsar Timing Array experiments probe the presence of possible scalar or pseudoscalar ultralight dark matter particles through decade-long timing of an ensemble of galactic millisecond radio pulsars. With the second data release of the European Pulsar Timing Array, we focus on the most robust scenario, in which dark matter interacts only gravitationally with ordinary baryonic matter. Our results show that ultralight particles with masses $10^{-24.0}~\text{eV} \lesssim m \lesssim 10^{-23.3}~\text{eV}$ cannot constitute $100\%$ of the measured local dark matter density, but can have at most local density $\rho\lesssim 0.3$ GeV/cm$^3$.

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