97 citations · 301 across the 26 of their papers we have counts for
28 papers
Radial Modes of Hot Neutrino-Trapped Hybrid Stars
Peter B. Rau, Andrea Sabatucci, Armen Sedrakian
We study the fundamental radial oscillation mode of hot hadronic and hybrid stars under conditions relevant to proto-neutron stars and neutron-star merger remnants. The stellar bac…
Bayesian Constraints on Bosonic Dark Matter in Neutron Stars within a Covariant Density-Functional Equation-of-State Ensemble
Davood Rafiei Karkevandi, Alexander Ayriyan, Armen Sedrakian
We investigate neutron stars admixed with repulsively self-interacting bosonic dark matter (DM) using current multi-messenger observations. The dark component is modeled as a compl…
Superfluidity and Vortex Dynamics in Neutron Stars
Bennett Link, Armen Sedrakian
Neutron stars contain several forms of quantum condensed matter whose microscopic properties control macroscopic rotational dynamics and magnetic behavior of these fascinating obje…
Nuclear Physics of Binary Neutron Star Mergers
Armen Sedrakian
Binary neutron star mergers provide a unique laboratory for studying matter under conditions that cannot be reproduced in terrestrial experiments. They probe dense matter at supran…
ESO Expanding Horizon White Paper: Revealing the properties of matter at supranuclear densities with gravitational waves
Tim Dietrich, Tanja Hinderer, Micaela Oertel +40
Understanding dense matter under extreme conditions is one of the most fundamental puzzles in modern physics. Complex interactions give rise to emergent, collective phenomena. Whil…
Thermoelectric coefficients of two-flavor quark matter from the Kubo formalism
Harutyun Gabuzyan, Arus Harutyunyan, Armen Sedrakian
The hot quark matter created in heavy-ion collision experiments can exhibit strong temperature and chemical-potential gradients, which in turn can generate electric fields through…
Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Influences of parametrizations of density dependent couplings
Guo-Jun Wei, Jia-Jie Li, Armen Sedrakian +3
Covariant density functionals have been successfully applied to the description of finite nuclei and dense nuclear matter. These functionals are often constructed by introducing de…
Impact of positrons on electrical conductivity of hot and dense astrophysical plasma
Tigran Petrosyan, Arus Harutyunyan, Armen Sedrakian
We study the influence of positrons on the outer crusts of neutron stars and the interiors of white dwarfs, introducing them as a novel component in both the composition of matter…
Thermal conduction and thermopower of a warm neutron star crust in magnetic fields
Henrik Danielyan, Arus Harutyunyan, Armen Sedrakian
We compute the thermal conductivity and thermopower of the inner crust of compact stars over a broad temperature-density domain relevant to proto-neutron stars, binary neutron-star…
Rapidly rotating hot nuclear and hypernuclear compact stars: integral parameters and universal relations
Stefanos Tsiopelas, Armen Sedrakian, Micaela Oertel
In this work, we investigate hot, isentropic compact stars in the limiting cases of static and maximally rotating configurations, focusing on how variations in the symmetry energy…
Effect of symmetry energy on properties of rapidly rotating neutron stars and universal relations
Pion Sudarshan Yeasin, Stefanos Tsiopelas, Armen Sedrakian +1
We investigated universal relations for compact stars rotating at the Keplerian (mass-shedding) limit, which is highly relevant for understanding the rapidly rotating objects forme…
Topology of the Superconducting Heart of Neutron Stars: Effects of Microphysics and Gravitational-Wave Signatures
Mayusree Das, Armen Sedrakian, Banibrata Mukhopadhyay
We present a general-relativistic study of the distribution of proton superconductivity in strongly magnetized neutron stars (NSs), using the XNS code to solve the coupled Einstein…
Simulating Binary Neutron Star Mergers with Finite-temperature Equations of State: The influences of the slope of the symmetry energy and artificial heating
Henrique Gieg, Maximiliano Ujevic, Armen Sedrakian +1
We present a new set of numerical-relativity simulations of merging binary neutron stars, aiming to identify possible observable signatures of the slope of the symmetry energy $L_{…
Bulk Viscosity of Two-Flavor Color Superconducting Quark Matter in Neutron Star Mergers
Mark Alford, Arus Harutyunyan, Armen Sedrakian +1
This work investigates the bulk viscosity of warm, dense, neutrino-transparent, color-superconducting quark matter, where damping of density oscillations in the kHz frequency range…
Bayesian inferences on covariant density functionals from multimessenger astrophysical data: The impacts of likelihood functions of low density matter constraints
Jia-Jie Li, Armen Sedrakian
We systematically investigate how the choice between Gaussian and uniform likelihood functions in Bayesian inference affects the inferred bulk properties of compact stars and nucle…
Generalized relativistic second-order dissipative hydrodynamics: coupling different rank tensors
Arus Harutyunyan, Armen Sedrakian
In this work, we extend the formalism of second-order relativistic dissipative hydrodynamics, developed previously using Zubarev's non-equilibrium statistical operator formalism. B…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Nucleonic models
Jia-Jie Li, Yu Tian, Armen Sedrakian
[Background] Bayesian inference frameworks incorporating multi-messenger astrophysical constraints have recently been applied to covariant density functional (CDF) models to constr…
Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements
Jia-Jie Li, Yu Tian, Armen Sedrakian
Recent advancements in astrophysical observations of compact stars, particularly the new and updated NICER constraints, have provided mass-radius (-) data for pulsars spannin…
The nuclear symmetry energy and the neutron skin thickness in nuclei
G. F. Burgio, H. C. Das, I. Vidana
We investigate possible correlations between the stiffness of the symmetry energy at saturation density, the so-called parameter, and the neutron skin thickness of Ca…
Confronting new NICER mass-radius measurements with phase transition in dense matter and twin compact stars
Jia Jie Li, Armen Sedrakian, Mark Alford
The (re)analysis of data on the X-ray emitting pulsars PSR J0030+0451 and J0740+6620, as well as new results on PSR J0437-4715 and J1231-1411, are confronted with the predictions o…
Thermal Conductivity and Thermal Hall Effect in Dense Electron-Ion Plasma
Arus Harutyunyan, Armen Sedrakian
In this study, we examine thermal conductivity and the thermal Hall effect in electron-ion plasmas relevant to hot neutron stars, white dwarfs, and binary neutron star mergers, foc…
Josephson currents in neutron stars
Armen Sedrakian, Peter B. Rau
We demonstrate that the interface between -wave and -wave paired superfluids in neutron stars induces a neutron supercurrent, a charge-neutral analog of the Josephson junctio…
Bulk viscosity of two-color superconducting quark matter in neutron star mergers
Mark Alford, Arus Harutyunyan, Armen Sedrakian +1
We study the bulk viscosity of moderately hot and dense, neutrino-transparent color superconducting quark matter arising from weak-interaction-driven direct URCA processes. The qua…