95 citations · 175 across the 12 of their papers we have counts for
12 papers
Probing the shape of the Milky Way dark matter halo with hypervelocity stars: a new method
Arianna Gallo, Luisa Ostorero, Sankha Subhra Chakrabarty +2
We propose a new method to determine the shape of the gravitational potential of the dark matter (DM) halo of the Milky Way (MW) with the galactocentric tangential velocities of a…
Density perturbations in axion-like particles: classical vs quantum field treatment
Sankha Subhra Chakrabarty
Axions and axion-like particles are bosonic quantum fields. They are often assumed to follow classical field equations due to their high degeneracy in the phase space. In this work…
Probing modified Newtonian dynamics with hypervelocity stars
Sankha Subhra Chakrabarty, Luisa Ostorero, Arianna Gallo +2
We show that measuring the velocity components of hypervelocity stars (HVSs) can discriminate between modified Newtonian dynamics (MOND) and Newtonian gravity. HVSs are ejected fro…
Dark matters on the scale of galaxies
Ivan de Martino, Sankha S. Chakrabarty, Valentina Cesare +3
The cold dark matter model successfully explains both the emergence and evolution of cosmic structures on large scales and, when we include a cosmological constant, the properties…
Implications of triangular features in the Gaia skymap for the Caustic Ring Model of the Milky Way halo
Sankha S. Chakrabarty, Yaqi Han, Anthony H. Gonzalez +1
The Gaia map of the Milky Way reveals a pair of triangular features at nearly symmetric locations on opposite sides of the Galactic Center. In this paper we explore the implication…
Duration of Classicality of an inhomogeneous quantum field with repulsive contact self-interactions
Ariel Arza, Sankha S. Chakrabarty, Seishi Enomoto +2
Quantum fields with large degeneracy are often approximated as classical fields. Here, we show how quantum and classical evolution of a highly degenerate quantum field with repulsi…
Search for dark photon, axion-like particles, dark scalar, or light dark matter in Compton-like processes
Sankha S. Chakrabarty, Igal Jaeglé
We propose a novel way to search for the dark photon (), the axion-like pseudo-scalar (), the dark scalar (), and the light dark matter () in the Compton-like processe…
Effects of a caustic ring of dark matter on the distribution of stars and interstellar gas
Sankha S. Chakrabarty, Pierre Sikivie
Caustic rings of dark matter with cross-section were predicted to lie in the galactic disk. Their radii increase on cosmological time scales at a rate of order $…
Duration of Classicality of Homogeneous Condensates with Attractive Interactions
Sankha Chakrabarty, Seishi Enomoto, Yaqi Han +2
Dark matter axions and other highly degenerate bosonic fluids are commonly described by classical field equations. In a recent paper \cite{BECprop} we calculated the duration of cl…
Gravitational self-interactions of a degenerate quantum scalar field
Sankha S. Chakrabarty, Seishi Enomoto, Yaqi Han +2
We develop a formalism to help calculate in quantum field theory the departures from the description of a system by classical field equations. We apply the formalism to a homogeneo…
Duration of classicality in highly degenerate interacting Bosonic systems
Pierre Sikivie, Elisa M. Todarello
We study sets of oscillators that have high quantum occupancy and that interact by exchanging quanta. It is shown by analytical arguments and numerical simulation that such systems…
Rotation of the polarization vector from distant radio galaxies in the perturbed FRW metric
Sankha Subhra Chakrabarty
Analysis of the correlation between the angular positions of distant radio galaxies on the sky and the orientations of their polarization vectors with respect to their major axes,…