We elaborate on the dynamics of ionized interstellar medium in the presence of hidden photon dark matter. Our main focus is the ultra-light regime, where the hidden photon mass is smaller than the plasma frequency in the Milky Way. We point out that as a result of the Galactic plasma shielding direct detection of ultra-light photons in this mass range is especially challenging. However, we demonstrate that ultra-light hidden photon dark matter provides a powerful heating source for the ionized interstellar medium. This results in a strong bound on the kinetic mixing between hidden and regular photons all the way down to the hidden photon masses of order 10-20 eV.
|Original language||English (US)|
|Journal||Journal of Cosmology and Astroparticle Physics|
|State||Published - Dec 29 2015|
- dark matter theory
- galaxy dynamics
ASJC Scopus subject areas
- Astronomy and Astrophysics