We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

We review the current status and recent progress of microscopic many-body approaches
and phenomenological models, which are employed to construct the equation of state of …

A bstract We consider the constraints from Supernova 1987A on particles with small
couplings to the Standard Model. We discuss a model with a fermion coupled to a dark …

We study the direct detection prospects for a representative set of simplified models of sub-
GeV dark matter (DM), accounting for existing terrestrial, astrophysical and cosmological …

Axion emission by hot and dense plasmas is a new energy-loss channel for stars.
Observable consequences include a modification of the solar sound-speed profile, an …

▪ Abstract Observation of cooling neutron stars can potentially provide information about the
states of matter at supernuclear densities. We review physical properties important for …

The most efficient axion production mechanism in a supernova (SN) core is the nucleon-
nucleon bremsstrahlung. This process has been often modeled at the level of the vacuum …

We review the main neutrino emission mechanisms in neutron star crusts and cores. Among
them are the well-known reactions such as the electron–positron annihilation, plasmon …

We obtain a reliable cosmological bound on the axion mass ma by (1) deriving the
production rate directly from pion-pion scattering data, which overcomes the breakdown of …

Recent experimental data and progress in nuclear structure modeling have led to improved
descriptions of astrophysically important weak-interaction processes. This review discusses …