A5010889644- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Magnetic confinement fusion research
- Quantum, superfluid, helium dynamics
- Dark Matter and Cosmic Phenomena
- High-pressure geophysics and materials
- Ionosphere and magnetosphere dynamics
- Cosmology and Gravitation Theories
- Cold Atom Physics and Bose-Einstein Condensates
- Astrophysical Phenomena and Observations
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Superconducting Materials and Applications
- Physics of Superconductivity and Magnetism
- Laser-Plasma Interactions and Diagnostics
- Artificial Intelligence in Healthcare and Education
- Outdoor and Experiential Education
- Ocular Infections and Treatments
- Geomagnetism and Paleomagnetism Studies
- Smart Systems and Machine Learning
Kōchi University
2025
RIKEN
2024
Sardar Vallabhbhai Patel University of Agriculture & Technology
2024
Vinayaka Missions University
2024
Homi Bhabha National Institute
2019-2023
Guru Gobind Singh Indraprastha University
2023
Chandigarh University
2023
Institute of Physics, Bhubaneshwar
2019-2022
Indian Institute of Technology Delhi
2019-2022
Institute for Plasma Research
2021-2022
We study the dark matter effects on nuclear parameters characterising equation of states super dense neutron-rich nucleonic-matter. The observables matter, i.e. incompressibility, symmetry energy and its higher-order derivatives in presence for symmetric asymmetric are analysed with help an extended relativistic mean-field model. calculations also to beta-stable explore properties neutron star. analyse pure star using NL3, G3 IOPB-I forces. binding per particle pressure calculated without...
We put constraints on the secondary component of GW190814 by analyzing observational data event. The relativistic mean-field models are used to calculate mass-radius profile and tidal deformability compact object, considering it as a massive neutron star with presence dark matter particles inside it. With increase percentage, maximum mass, radius, decreases. observe that predicted properties well consistent data, suggesting possibility admixed if underlying nuclear equation state is...
We investigate the $f$-mode oscillation of dark matter admixed hyperon star within relativistic Cowling approximation. The macroscopic properties are calculated with mean-field equation states by assuming that particles inside star. frequencies (only for $l=2$) four different neutron states. also check effects hyperons/dark and hyperons on oscillations varying astrophysical quantities such as mass ($M$), radius ($R$), compactness ($M/R$), surface red-shift ($Z_s$), average density...
Using the relativistic mean-field model, we calculate properties of binary neutron star (BNS) in in-spiral phase. Assuming dark matter (DM) particles are accreted inside (NS) due to its enormous gravitational field, mass $M$, radius $R$, tidal deformability $\lambda$ and dimensionless $\Lambda$ calculated at different DM fractions. The value decreases with increase percentage NS. phase BNS explored within post-Newtonian (PN) formalism, as it is suitable up last orbits We strain amplitude...
The neutron star properties are generally determined by the equation of state $\beta$-equilibrated dense matter. In this work, we consider interaction fermionic dark matter (DM) particles with nucleons via Higgs exchange and investigate its effect on relativistic mean-field model coupled DM. We deduce that DM significantly affects properties, such as considerably reduce maximum mass star, which depends percentage considered inside star. tidal Love numbers both for electric magnetic cases...
ABSTRACT Motivated by the various theoretical studies regarding efficient capturing of dark matter neutron stars, we explore possible indirect effects captured on cooling mechanism a star. The equation states for different configurations admixed star at finite temperature is obtained using relativistic mean-field formalism with IOPB-I parameter set. We show that variation in momentum vastly modifies neutrino emissivity through specific generating processes heat and thermal conductivity have...
Abstract The formulation of quarkyonic matter consists treating both quarks and nucleons as quasi-particles, where a cross-over transition occurs between the two phases. This work is based on some early ideas quark (QM). It has satisfied different observational constraints neutron star (NS), such its maximum mass canonical radius. In addition, we put an extra component inside NS, known Dark Matter (DM) because it trapped due to immense gravitational potential. this work, explore impact...
In this study, we investigate the impact of dark matter (DM) on neutron stars (NSs) using a two-fluid formalism that treats nuclear (NM) and DM as gravitationally coupled components. Employing NM equations state spanning wide range stiffness self-interacting asymmetric fermionic framework, explore emergence core- halo-dominated structures their observational implications. Constraints from gravitational waves (GW170817), NICER X-ray measurements (PSR J0030+0451), pulsar mass limits...
Context. Giant Low Surface Brightness galaxies, such as Malin 1, host extended stellar and gaseous disks exceeding 100 kpc in radius. Their formation evolution remain debated, with interactions satellite galaxies accretion streams proposed key contributors. 1 has multiple satellites, including 1A, 1B, the newly reported 1C, along eM1 at 350 kpc. Additionally, it exhibits two giant streams, largest extending 200 kpc, likely linked to past interactions. Aims. We investigate orbital dynamics of...
Abstract Since the 2018 IAEA-FEC conference, in addition to expanding parameter horizons of ADITYA-U machine, emphasis has been given dedicated experiments on inductively driven particle injection (IPI) for disruption studies, runaway electron (RE) dynamics and mitigation, plasma rotation reversal, radiative-improved modes using Ne Ar injection, modulation magneto–hydrodynamic modes, edge turbulence periodic gas puffs electrode biasing (E-B). Plasma parameters close design circular plasmas...
The secondary component of the GW190814 event left us with a question, "whether it is supermassive neutron star or lightest black-hole?". Recently, Fattoyev et al. have obtained an energy density functional (EDF) named as BigApple, which reproduces mass 2.60 $M_\odot$ well consistent data. This study explores properties finite nuclei, nuclear matter, and stars by using BigApple EDF along four well-known relativistic mean-field forces, namely NL3, G3, IOPB-I, FSUGarnet. nuclei like binding...
We use the effective relativistic mean-field (E-RMF) model to study crustal properties of neutron star. The unified equations state (EoS) are constructed using recently developed E-RMF parameter sets, such as FSUGarnet, IOPB-I, and G3. outer crust composition is determined atomic mass evaluation 2020 data [Chinese Physics C {\bf 45}, 030002 (2021)] along with available Hartree-Fock-Bogoliubov models [Phys. Rev. 88}, 024308 (2013)] for neutron-rich nuclei. structure inner estimated by...
The exotic nuclei are a fertile source of new features nuclear structure. evolution shell gaps accompanied by quenching classical magic numbers is one the marked in these nuclei. These studies aimed to search and explore such behavior find major significance on both experimental theoretical fronts. Here, we present an inclusive study significant evidence existence deformed closure at neutron number N = 100 rare earth Nd, Sm, Gd Dy nuclei, obtained from persistence peak analysis symmetry...
We study the properties of pasta structures and their influence on neutron star observables employing effective relativistic mean-field (E-RMF) model. The compressible liquid drop model is used to incorporate finite size effects, considering possibility nonspherical in inner crust. unified equation state are constructed for several E-RMF parameters various such as mass thickness star's majority sensitive symmetry energy subsaturation density region. Using results from Monte Carlo...
We investigate the impact of dark matter on neutron star properties using relativistic mean-field theory. By incorporating model, we explore how parameters, specifically mass and Fermi momentum, influence nuclear saturation properties, equation state, mass-radius relationship stars. also examine universal relation between dimensionless tidal deformability compactness in presence matter. Our results show that inclusion significantly alters leading to higher incompressibility symmetry energy...
The newly derived relativistic energy density functional [Phys. Rev. C 103, 024305 (2021)], which stems from the effective field theory motivated mean (E-RMF), is employed to establish appearance of peaks and/or kinks in symmetry over isotopic chain Pb nuclei. coherent fluctuation model parametrization procedure for finite nuclei adopted here obtain at local density. mean-field takes precedence Br\"uckner as it accurately predicts empirical saturation and binding per nucleon $E/A$, so-called...
We obtained a density-dependent analytical expression of binding energy per nucleon for different neutron-proton asymmetry the nuclear matter (NM) with polynomial fitting, which manifests results effective field theory motivated relativistic mean-field (E-RMF) model. This has edge over Br$\ddot{u}$ckner density functional [Phys. Rev. {\bf 171}, 1188 (1968)] since it resolves Coster-Band problem. The NM parameters like incompressibility, neutron pressure, symmetry energy, and its derivatives...
The formulation of quarkyonic matter consists treating both quarks and nucleons as quasi-particles, where a cross-over transition occurs between the two phases. This work is based upon some early ideas quark matter. It can satisfy different observational constraints on neutron star (NS), such its maximum mass canonical radius. In addition, we put an extra component inside NS known Dark Matter (DM) because it trapped due to immense gravitational potential. this work, explore impact fermionic...
Short bursts (1 -2 ms) of gas, injecting ~ 10 17 -10 18 molecules hydrogen as well deuterium, lead to observations phenomena cold pulse propagation in plasmas the ADITYA-U tokamak.After every injection gas-pulse, a sharp increase chord-averaged density followed by an core temperature has been observed.Simultaneously edge and decreases, suggesting due gas-pulse application.It observed that subsequent depend on both value plasma at instant gasinjection amount gas injected up threshold...