Pulsar timing array constraints on spin-2 ULDM

0540696 - FZÚ 2021 RIV GB eng J - Journal Article
Manuel Armaleo, J. - Lopez Nacir, D. - Urban, Federico
Pulsar timing array constraints on spin-2 ULDM.
Journal of Cosmology and Astroparticle Physics. Roč. 2020, č. 9 (2020), s. 1-19, č. článku 031. ISSN 1475-7516. E-ISSN 1475-7516
R&D Projects: GA MŠMT EF15_003/0000437
Grant - others:OP VVV - CoGraDS(XE) CZ.02.1.01/0.0/0.0/15_003/0000437
Institutional support: RVO:68378271
Keywords : signature * anisotropy * pulsar * dark matter theory * modified gravity
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 5.839, year: 2020
Method of publishing: Limited access
https://doi.org/10.1088/1475-7516/2020/09/031

Ultra-light Dark Matter (ULDM) models are suitable candidates for the cosmological Dark Matter that may leave characteristic imprints in many observables. Among other probes, signatures of ULDM can be searched for in pulsar timing data. In this work we describe the effects of spin-2 ULDM on pulsar timing arrays, extending previous results on lower spins. Spin-2 ULDM is universally coupled to standard matter with dimensionless strength α. We estimate that current data could constrain this coupling in the mass range m ≲ 4 × 10−22 eV at the 10−5 to 10−6 level, which is the most competitive constraint in this mass range. A crucial feature of the spin-2 ULDM effect on pulsar timing is its anisotropic, quadrupolar shape. This feature can be instrumental in differentiating the effects sourced by spin-2 ULDM from, for instance, scalar ULDM, and the systematics of a PTA experiment.

Permanent Link: http://hdl.handle.net/11104/0318314