13 citations · 36 across the 11 of their papers we have counts for
11 papers
Universality of dual mass-scaled fundamental modes in two-fluid neutron stars with mirror dark matter
Hajime Sotani, Ankit Kumar
Universal relations provide a particularly useful way to extract physical information from neutron star observables in the presence of various uncertainties by reducing the depende…
Non-radial pulsations of gravitationally coupled two-fluid neutron stars in general relativity
Ankit Kumar, Daniel A. Caballero, Hajime Sotani +1
Non-radial oscillations of neutron stars provide a powerful probe of stellar structure and relativistic gravity, but a fully general relativistic treatment for gravitationally coup…
Slowly Rotating Two-Fluid Neutron Stars: Coupled Frame-Dragging, Inertia Splitting, and Universal Relations
Ankit Kumar, Hajime Sotani
We develop a fully relativistic framework to study the rotational response of gravitationally coupled two-fluid neutron stars within the slow-rotation approximation. Treating the t…
Universal relation involving fundamental modes in two-fluid dark matter admixed neutron stars
Hajime Sotani, Ankit Kumar
We systematically investigate the fundamental oscillation frequencies of dark matter admixed neutron stars, focusing on models with self-interacting fermionic dark matter that coup…
Stability analysis of two-fluid neutron stars featuring twin star and ultradense configurations
Ankit Kumar, Hajime Sotani
We perform a detailed analysis of radial oscillations to discuss dynamical stability in two-fluid neutron stars composed of ordinary nuclear matter and a gravitationally coupled da…
Asteroseismology and Universal Relations in Neutron Stars with Gravitationally Bound Dark Matter
Ankit Kumar, Hajime Sotani
We investigate the structural, dynamical, and oscillatory properties of neutron stars admixed with dark matter, modeled via a single-fluid formalism where dark matter interacts wit…
Emergence of new oscillation modes in dark matter admixed neutron stars
Hajime Sotani, Ankit Kumar
Dark matter admixed neutron stars provide a promising avenue for observationally probing the dark matter characteristic. In this study, we examine non-radial oscillations in neutro…
Multi-Messenger and Cosmological Constraints on Dark Matter through Two-Fluid Neutron Star Modeling
Ankit Kumar, Sudhakantha Girmohanta, Hajime Sotani
In this study, we investigate the impact of dark matter (DM) on neutron stars (NSs) using a two-fluid formalism that treats nuclear matter (NM) and DM as gravitationally coupled co…
Impact of dark matter distribution on neutron star properties
Ankit Kumar, Hajime Sotani
We investigate the structural and observable impacts of dark matter (DM) on neutron stars using a combined equation of state that integrates the relativistic mean field (RMF) model…
Constraints on the parameter space in dark matter admixed neutron stars
Ankit Kumar, Hajime Sotani
We investigate the impact of dark matter on neutron star properties using the relativistic mean-field theory. By incorporating the dark matter model, we explore how dark matter par…
Dark Matter Influence on Quarkyonic Stars: A Relativistic Mean Field Analysis
D. Dey, Jeet Amrit Pattnaik, H. C. Das +3
The formulation of quarkyonic matter consists of treating both quarks and nucleons as quasi-particles, where a cross-over transition occurs between the two phases. This work is bas…