18 papers
Constraints on magnetic monopoles from X-ray observations of neutron stars
Mainak Mukhopadhyay, Daniele Perri, Edward W. Kolb
Magnetic monopoles are captured efficiently by neutron stars, and if they catalyze nucleon decay, the decay products would thermalize and generate observable X-ray surface emission…
Galactic Center Neutrinos from Cosmic Ray-Dark Matter Interactions
Jorge Terol Calvo, Pedro de la Torre Luque, Mainak Mukhopadhyay +2
The IceCube and ANTARES collaborations have recently reported evidence for high-energy neutrinos associated with the Galactic plane and the Galactic Ridge, offering a new pathway t…
Cosmic-ray boosted inelastic dark matter from neutrino-emitting active galactic nuclei
R. Andrew Gustafson, Gonzalo Herrera, Mainak Mukhopadhyay +2
Cosmic rays may scatter off dark matter particles in active galactic nuclei, where both the densities of cosmic rays and dark matter are expected to be very large. These scattering…
Ultra high-energy cosmic rays from relativistic outflows in accretion induced collapse of white dwarfs
Mainak Mukhopadhyay, Shunsaku Horiuchi
When a rapidly-rotating, highly magnetized white dwarf (WD) approaches the Chandrashekhar limit through mass accretion, it can undergo an accretion-induced collapse (AIC) to form a…
High-energy neutrino constraints on primordial black holes as dark matter
Mainak Mukhopadhyay, Joaquim Iguaz Juan
Primordial black holes (PBHs) are one of the most appealing dark matter candidates over a wide range of masses and abundances. This broad parameter space has been constrained by a…
Neutrino and electromagnetic signatures from Superluminous Supernovae: a case study for SN 2017egm
Mainak Mukhopadhyay, Shigeo S. Kimura, Indrek Vurm +1
Superluminous supernovae (SLSNe) are rare transients that are times more luminous than ordinary stellar explosions, reaching peak optical luminosities $\sim 10^{44}…