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 …

When hypothetical neutrino secret interactions (ν SI) are large, they form a fluid in a
supernova (SN) core, flow out with sonic speed, and stream away as a fireball. For the first …

We propose a new scenario for the formation of asteroid-mass primordial black holes
(PBHs). Our mechanism is based on the annihilation of the string-wall network associated …

Neutrino-neutrino scattering could have a large secret component that would turn neutrinos
within a supernova (SN) core into a self-coupled fluid. Neutrino transport within the SN core …

In post-inflation axion-like particle (ALP) models, a stable domain wall network forms if the
model's potential has multiple minima. This system must annihilate before dominating the …

Sterile neutrinos with masses up to O (100) MeV can be copiously produced in a supernova
(SN) core through the mixing with active neutrinos. In this regard, the SN 1987A detection of …

The Fermi-LAT observations of SN 2023ixf, a type II supernova in the nearby Pinwheel
Galaxy, Messier 101 (M101), presents us with an excellent opportunity to constrain MeV …

Axionlike-particles are a well-motivated extension of the Standard Model that can mediate
interactions between the dark matter and ordinary matter. Here we consider an axion portal …

A bstract Light hypothetical particles with masses up to\(\mathcal {O}(100)\) MeV can be
produced in the core of supernovae. Their subsequent decays to neutrinos can produce a …

We study MeV-scale electrophilic feebly interacting particles (FIPs), that may be abundantly
produced in supernova explosions, escape the star and decay into electrons and positrons …