12 citations · 31 across the 18 of their papers we have counts for
18 papers
Relativistic Oblique Shocks at Finite Temperature: Detachment Angle, Shock Polars, and the Turning Parameter
Rushikesh Ashok Sonkusale, Anshuman Verma, Ritam Mallick
Oblique shocks are ubiquitous in high-energy astrophysical environments, yet a systematic analytical treatment of how finite upstream temperature influences the maximum deflection…
Constraining the High-Density Equation of State with Present and Future NICER Observations Using Physics-Informed Regularized Machine Learning
Utkarsh Atul Deshmukh, Asim Kumar Saha, Ritam Mallick
The precise mass and radius measurements of neutron stars by NICER have significantly advanced our ability to constrain the properties of matter at supranuclear densities. In this…
Neutron stars with an agnostic Dark sector: Core and Halo configurations from a two-fluid approach
Asit karan, Asim Kumar Saha, Tuhin Malik +2
The study of dark matter admixed neutron stars has the potential to advance our understanding of dark matter particle candidates. However, the large parameter space of dark matter…
A geometric physics-informed machine learning inference for the neutron star maximum mass and the inverse problem
Rounak Mukherjee, Ritam Mallick
The existence of a distinct mass boundary between the heaviest neutron stars and the lightest black holes remains in question. It is an artefact of our ignorance of the properties…
Constraining Twin-Star Existence in Four-Parameter Maxwell Equation of State
Shamim Haque, Atharva Shinde, Asim Kumar Saha +2
Twin stars (TSs) are predicted to exist in nature if the hadron-to-quark phase transition is strong enough to form a new branch of hybrid stars, separated from the branch of neutro…
Dynamical response of twin stars to perturbations
Shamim Haque, Luciano Rezzolla, Ritam Mallick
If a strong first-order phase transition takes place at sufficiently high rest-mass densities in the equation of state (EOS) modelling compact stars, a new branch will appear in th…
Curvature Effect on the Speed of Sound
Anshuman Verma, Asim Kumar Saha, Ritam Mallick
The speed of sound refers to the rate at which information travels from one point to another. It is a positive quantity and bounded by causality. It is defined as the rate of chang…
Are NICER and GW170817 constraints suggesting a compactified scenario for Neutron stars?
Asim Kumar Saha, Tuhin Malik, Ritam Mallick
Astrophysical observations from NICER and gravitational wave data constrain the properties of matter at the cores of neutron stars, enabling us to probe high-density matter with gr…
Imprints of Non-Symmetric Dark Matter Halos on Magnetars: A Two-Fluid Perspective
Asit karan, Anil Kumar, Monika Sinha +1
In this study, we investigate the impact of dark matter on the structure and deformation of magnetars. We assume a perturbative approach for the magnetic field deformation and that…
Probing the Internal Structure of Neutron Stars: A Comparative Analysis of Three Different Classes of Equations of State
Anshuman Verma, Asim Kumar Saha, Tuhin Malik +1
Sound speed can be an important tool in unraveling the nature of matter that exists at the cores of neutron stars. In this study, we investigate three major classes of equations of…
Distinct Signatures of the Nature of Phase Transition in Binary Neutron Star Mergers
Sagnik Chatterjee, Shamim Haque, Kamal Krishna Nath +2
Binary neutron-star mergers offer crucial insights into the matter properties of neutron stars. We present the possible imprints in the gravitational wave signal from the nature of…
Comparison of Equations of State for Neutron Stars with First-Order Phase Transitions: A Qualitative Study
Anshuman Verma, Asim Kumar Saha, Ritam Mallick
The equation of state is fundamental in describing matter under the extreme conditions characteristic of neutron stars and is central to advancing our understanding of dense matter…
Causality and perturbative-QCD constraints on first-order phase transitions in neutron stars
Asim kumar Saha, Ritam Mallick
Causality bounds the compactness and maximum mass of neutron stars. We generalise this bound to equations of state (EOSs) with a first-order phase transition between maximally stif…
Analyzing the dense matter equation of states in the light of the compact object HESS J1731-347
Skund Tewari, Sagnik Chatterjee, Deepak Kumar +1
The recent mass () and radius () measurement of HESS J1731-347 made it one of the most fascinating object if it i…
Modification of the universal relation between mass, radius and nonradial -mode oscillation in proto-neutron stars
Deepak Kumar, Asit Karan, Anshuman Verma +2
Neutron stars are usually assumed to be cold; however, in certain dynamical astrophysical scenarios such as newly born neutron stars or binary star mergers, the temperature effects…
The prospect of confining the equation of state of neutron star with future mass and radius measurement
Asim Kumar Saha, Ritam Mallick
Simultaneous measurement of mass and radius with high precision is essential to unravel the equation of state of matter at the centre of neutron stars. Measurement of massive pulsa…
Prospect of unraveling the first-order phase transition in neutron stars with and modes
Pratik Thakur, Sagnik Chatterjee, Kamal Krishna Nath +1
Quasi-normal modes of neutron stars are an exciting prospect for analyzing the internal composition of NSs and studying matter at high densities. In this work, we focus on studying…
Deciphering Accretion-Driven Starquakes in Recycled Millisecond Pulsars using Gravitational Waves
Sagnik Chatterjee, Kamal Krishna Nath, Ritam Mallick
Recycled millisecond pulsars are susceptible to starquakes as they are continuously accreting matter from their binary companion. A starquake happens when the rotational frequency…