From the 1 of 9 linked papers with an AI index.
9 papers
Universality of dual mass-scaled fundamental modes in two-fluid neutron stars with mirror dark matter
Hajime Sotani, Ankit Kumar
The paper investigates the vibration frequencies of neutron stars containing mirror dark matter using a two‑fluid model, showing that mass‑scaled fundamental frequencies follow uni…
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…