2022
06/21
OPEN
Date
2022/06/21 11:00 – 12:00
Venue
Online (Zoom)
Speaker
Dr. Joshua Eby, Kavli IPMU
Language
English
URL
Contact
Ryutaro Matsudo / matsudo-AT-post.kek.jp
Overview
Ultralight dark matter (ULDM) is known to form self-gravitating bound states through gravitational relaxation. There are intriguing hints in the literature suggesting similar dynamics might lead to overdensities in the solar system as well, with ULDM becoming bound to the Sun. These Solar Halos can be probed by experiments on Earth when their radius R>1 AUR>1 AU, which implies ULDM particle masses m<10−14 eVm<10−14 eV. For larger masses mm, space-based missions on orbits within 1 AU can probe small, compact Solar Halos with exceptional reach; for scalar couplings probable in current and near-future atomic clock systems, the sensitivity can exceed that of Equivalence Principle tests and probe well-motivated space for natural scalar field models. I will review the state of the art on these topics, including several exciting NASA and international space missions that motivate searches aboard space probes.