WDs and neutron stars are far-reaching and multi-faceted laboratories in the hunt for dark
matter. We review detection prospects of wave-like, particulate, macroscopic and black hole …

It is commonly assumed that the energy density of the Universe was dominated by radiation
between reheating after inflation and the onset of matter domination 54,000 years later …

Dark matter coupled solely gravitationally can be produced through the decay of primordial
black holes in the early universe. If the dark matter is lighter than the initial black hole …

In many cosmologies dark matter clusters on subkiloparsec scales and forms compact
subhalos, in which the majority of Galactic dark matter could reside. Null results in direct …

Pulsars act as accurate clocks, sensitive to gravitational redshift and acceleration induced by
transiting clumps of matter. We study the sensitivity of pulsar timing arrays (PTAs) to single …

Dark matter substructure on small scales is currently weakly constrained, and its study may
shed light on the nature of the dark matter. In this work we study the gravitational effects of …

Dark matter may be in the form of nonbaryonic structures such as compact subhalos and
boson stars. Structures weighing between asteroid and solar masses may be discovered via …

Modified expansion rates in the early Universe prior to big bang nucleosynthesis are
common in modified gravity theories, and can have a significant impact on the generation of …

A bstract We study the freeze-in production of Feebly Interacting Massive Particle (FIMP)
dark matter candidates through a neutrino portal. We consider a hidden sector comprised of …

A bstract The quantum chromodynamics axion with a decay constant near the Grand
Unification (GUT) scale has an ultralight mass near a neV. We show, however, that axion …