分类： 天文学 >> 天文学 提交时间： 2023-02-19
Masha Baryakhtar
Regina Caputo
Djuna Croon
Kerstin Perez
Emanuele Berti
Joseph Bramante
Malte Buschmann
Richard Brito
Thomas Y. Chen
Philippa S. Cole
Adam Coogan
William E. East
Joshua W. Foster
Marios Galanis
Maurizio Giannotti
Bradley J. Kavanagh
Ranjan Laha
Rebecca K. Leane
Benjamin V. Lehmann
Gustavo Marques-Tavares
摘要： Exploring dark matter via observations of extreme astrophysical environments -- defined here as heavy compact objects such as white dwarfs, neutron stars, and black holes, as well as supernovae and compact object merger events -- has been a major field of growth since the last Snowmass process. Theoretical work has highlighted the utility of current and near-future observatories to constrain novel dark matter parameter space across the full mass range. This includes gravitational wave instruments and observatories spanning the electromagnetic spectrum, from radio to gamma-rays. While recent searches already provide leading sensitivity to various dark matter models, this work also highlights the need for theoretical astrophysics research to better constrain the properties of these extreme astrophysical systems. The unique potential of these search signatures to probe dark matter adds motivation to proposed next-generation astronomical and gravitational wave instruments.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
摘要： The direct capture and accumulation of Galactic dark matter in astrophysical bodies can occur as a result of its scattering with nuclei. In this work we investigate the detailed capture and evaporation of dark matter in terrestrial planets, taking Earth as an example. We focus on the strongly interacting case in which Earth may be opaque to dark matter, referred to as the "optically thick" limit. We investigate light dark matter in particular, addressing important dynamical processes such as the "ping-pong effect" during dark matter capture and the heating of Earth by dark matter annihilation. We do this using Monte-Carlo simulations as well as detailed analytical computations, and obtain improved bounds on dark matter direct detection for both spin-dependent and spin-independent scattering, and also allowing for the interacting species to make up a sub-component of the dark matter density.
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