info:eu-repo/semantics/article
Pulsar timing array constraints on spin-2 ULDM
Fecha
2020-09Registro en:
Armaleo, Juan Manuel; Lopez Nacir, Diana Laura; Urban, Federico R.; Pulsar timing array constraints on spin-2 ULDM; IOP Publishing; Journal of Cosmology and Astroparticle Physics; 2020; 9; 9-2020; 1-19
1475-7516
CONICET Digital
CONICET
Autor
Armaleo, Juan Manuel
Lopez Nacir, Diana Laura
Urban, Federico R.
Resumen
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.