Search Publications
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data
Gariazzo, Stefano; Archidiacono, Maria; Hannestad, Steen +4 more
We reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom. We perform a series of extensive analyses fitting various combinations of cosmic microwave background (CMB) data from Planck, the Atacama Cosmology Telescope (ACT) and the South …
Introducing the MeVCube concept: a CubeSat for MeV observations
Lucchetta, Giulio; Ackermann, Markus; Berge, David +1 more
Despite the impressive progress achieved both by X-ray and gamma-ray observatories in the last few decades, the energy range between ~ 200 keV and ~ 50 MeV remains poorly explored. COMPTEL, on-board the Compton Gamma-Ray Observatory (CGRO, 1991-2000), opened the MeV gamma-ray band as a new window to astronomy, performing the first all-sky survey i…
Diffuse x-ray and gamma-ray limits on boson stars that interact with nuclei
Acevedo, Javier F.; Bhoonah, Amit; Bramante, Joseph
Light bosonic dark matter can form gravitationally bound states known as boson stars. In this work, we explore a new signature of these objects interacting with the interstellar medium (ISM). We show how small effective couplings between the bosonic dark matter and the nucleon lead to a potential that accelerates ISM baryons as they transit the bo…