Dark Matter In Extreme Astrophysical Environments
  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.
