12 papers
Gamma-Ray Bursts as an Independent High-Redshift Probe of Dark Energy
Maria Giovanna Dainotti, Aleksander Åukasz Lenart, Biagio De Simone +6
Testing the CDM model requires cosmological probes spanning the wide redshift interval between Type Ia Supernovae (SNe Ia, ) and the Cosmic Microwave Background (…
Microscopic primordial black holes as macroscopic dark matter from large extra dimensions
Giuseppe Filiberto Vitale, Gaetano Lambiase, Tanmay Kumar Poddar +1
We study the coupled cosmological evolution of primordial black holes (PBHs) and radiation in the Arkani-Hamed-Dimopoulos-Dvali (ADD) framework with large extra dimensions and…
Ultralight time-oscillating scalars from magnetized compact stars: electrophilic radiation and photon propagation effects
Tanmay kumar Poddar, Gaetano Lambiase
Ultralight scalars with electrophilic couplings to the time-dependent Goldreich-Julian charge density of magnetized compact stars can be radiated from their magnetospheres, contrib…
Searching for New Physics in Ultradense Environment: a Review on Dark Matter Admixed Neutron Stars
Francesco Grippa, Gaetano Lambiase, Tanmay Kumar Poddar
Neutron Stars (NSs), among the densest objects in the Universe, are exceptional laboratories for investigating Dark Matter (DM) properties. Recent theoretical and observational dev…
Scalar and vector dark matter admixed neutron stars with linear and quadratic couplings
Francesco Grippa, Gaetano Lambiase, Tanmay Kumar Poddar
We investigate the effects of dark scalar- and vector-mediated interactions on dark matter admixed neutron stars, employing the two-fluid formalism. We adopt three different nuclea…
Gravitational Signatures of Axion Dark Matter via Parity-Violating Interactions
Marco Figliolia, Francesco Grippa, Gaetano Lambiase +1
We investigate axion-like particles coupled to gravity through a parity-violating Chern-Simons (CS) interaction. In this framework, axion dark matter (DM) can decay into pairs of c…