Dec 11 – 15, 2023
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Pulsar timing residuals induced by wideband ultralight dark matter

Dec 11, 2023, 2:35 PM
15m
Hall # 9

Hall # 9

Contributed talk in mini symposium Dark Matter

Speaker

Yun-Long Zhang (NAOC)

Description

The coherent oscillation of ultralight Fuzzy dark matter induces changes in gravitational potential with the frequency in the nanohertz range. This effect is known to produce a monochromatic signal in the pulsar timing residuals. Here we discuss a multifield scenario that produces a wide spectrum of frequencies, such that the ultralight particle oscillation can mimic the pulsar timing signal of stochastic common spectrum process. We discuss how ultralight dark matter with various spins produces such a wide band spectrum on pulsar timing residuals and perform the Bayesian analysis to constrain the parameters.

Primary author

Presentation materials