Pulsar timing array constraints on spin-2 ULDM

Understand

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 $\alpha$.