Kavli Affiliate: Jia Liu
| First 5 Authors: Haipeng An, Shuailiang Ge, Wen-Qing Guo, Xiaoyuan Huang, Jia Liu
| Summary:
Dark photon can be the ultralight dark matter candidate, which can interact
with the Standard Model particles via the kinetic mixing. We propose to look
for ultralight dark photon dark matter (DPDM) with local absorption at the
radio telescope. The DPDM induces an harmonic oscillation of the electrons in
the antenna of a radio telescope, which induces a monochromatic radio signal,
and will be recorded by the telescope detectors. We show that with this method,
the upper limit from the observation data of the FAST telescope on the kinetic
mixing can already reach $10^{-12}$ for DPDM with oscillation frequency range
$1-1.5$ GHz, stronger than the CMB constraint by about one order of magnitude.
We also show that with large scale interferometric arrays the LOFAR and SKA1
telescopes can achieve extraordinary sensitivities for DPDM from 10 MHz to 10
GHz, and provide a competing and complementary method to search for DPDM
directly.
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