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Gamma-Light: High-Energy Astrophysics above 10 MeV
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Dynamical response of the nuclear “pasta” in neutron star crusts
The nuclear pasta - a novel state of matter having nucleons arranged in a variety of complex shapes - is expected to be found in the crust of neutron stars and in core-collapse supernovae at…
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Heavy sterile neutrinos in stellar core-collapse
We perform spherically symmetric simulations of the core collapse of a single progenitor star of zero age main sequence mass $M_{\rm ZAMS} = 15 \, M_{\odot}$ with two models of heavy sterile…
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Enhanced Neutrino Emissivities in Pseudoscalar-mediated Dark Matter Annihilation in Neutron Stars
We calculate neutrino emissivities from self-annihilating dark matter (DM) (χ) in the dense and hot stellar interior of a (proto)neutron star. Using a model where DM interacts with nucleons in the…
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Magnetic susceptibility and magnetization properties of asymmetric nuclear matter in a strong magnetic field
We study the effect of a strong magnetic field on the proton and neutron spin polarization and magnetic susceptibility of asymmetric nuclear matter within a relativistic mean-field approach. It is…
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Semileptonic B and B{sub s} decays into orbitally excited charmed mesons
The BABAR Collaboration has recently reported products of branching fractions that include B meson semileptonic decays into final states with charged and neutral D{sub 1}(2420) and D{sub 2}*(2460),…
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Diffusion of dark matter in a hot and dense nuclear environment
We calculate the mean free path in a hot and dense nuclear environment for a fermionic dark matter particle candidate in the $\sim$GeV mass range interacting with nucleons via scalar and vector…
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Gamma rays from dark mediators in white dwarfs
We consider self-annihilation of dark matter, $\chi$, into metastable mediators, $Y$, and their subsequent decay into photons inside white dwarfs. We focus on reactions of the type $\chi…
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Light dark matter scattering in outer neutron star crusts
We calculate for the first time the phonon excitation rate in the outer crust of a neutron star due to scattering from light dark matter (LDM) particles gravitationally boosted into the star. We…
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Modified Gravity at Astrophysical Scales
Using a perturbative approach we solve stellar structure equations for low-density (solar-type) stars whose interior is described with a polytropic equation of state in scenarios involving a subset…
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