PPC 2026

Session

Particle Astrophysics

3 Sept 2026, 16:10

79. Hard X-rays from Axion to Photon Converted Flux Employing Density Dependent Critical Temperature

Prof. Madhukar Mishra (Department of Physics, Birla Institute of Technology and Science, Pilani Campus, Rajasthan, India)

03/09/2026, 16:10

Particle astrophysics

We investigate axion emission from canonical $1.4\,M_\odot$ neutron stars using the APR and SLy equations of state, with particular emphasis on axion production through nucleon-nucleon bremsstrahlung and Cooper pair breaking and formation (PBF) processes in the stellar core. The background stellar structure is constructed by solving the Tolman-Oppenheimer-Volkoff equations in the presence of a...

45. New neutrino-background from black hole superradiance

Ms Anna John (IISER Berhampur)

03/09/2026, 16:35

Particle astrophysics

The existence of rapidly spinning black hole and ultralight boson capable of forming superradiant cloud around it can provide a non-zero lower bound on fermion couplings with the ultralight bosons. We propose that a hitherto unexplored manifestation of it in terms of neutrinos provide a minimal and concrete realization of the mechanism and can produce a diffuse cosmic background of neutrinos....

86. Exotic energy injection in the 21-cm power spectrum

Daniela Montes Doria (Australian National University)

03/09/2026, 17:00

Particle astrophysics

The 21-cm signal provides a new window into the thermal and ionization history of the early Universe, making it a powerful probe of exotic energy injection processes, including those sourced by dark matter (DM). We develop an effective parametric model for the heating deposition function, $f_{heat}(z)$, capturing the redshift-dependent impact of generic energy injection histories on the...