Neutron-star tidal deformability and equation-of-state constraints

K Chatziioannou - General Relativity and Gravitation, 2020 - Springer
Despite their long history and astrophysical importance, some of the key properties of
neutron stars are still uncertain. The extreme conditions encountered in their interiors …

Impact of the PSR radius constraint on the properties of high-density matter

I Legred, K Chatziioannou, R Essick, S Han, P Landry - Physical Review D, 2021 - APS
X-ray pulse profile modeling of PSR J 0740+ 6620, the most massive known pulsar, with
data from the NICER and XMM-Newton observatories recently led to a measurement of its …

Nonparametric constraints on neutron star matter with existing and upcoming gravitational wave and pulsar observations

P Landry, R Essick, K Chatziioannou - Physical Review D, 2020 - APS
Observations of neutron stars, whether in binaries or in isolation, provide information about
the internal structure of the most extreme material objects in the Universe. In this work, we …

Relativistic description of dense matter equation of state and compatibility with neutron star observables: a Bayesian approach

T Malik, M Ferreira, BK Agrawal… - The Astrophysical …, 2022 - iopscience.iop.org
The general behavior of the nuclear equation of state (EOS), relevant for the description of
neutron stars (NSs), is studied within a Bayesian approach applied to a set of models based …

Recent multimessenger constraints and the anisotropic neutron star

A Rahmansyah, A Sulaksono - Physical Review C, 2021 - APS
The impact of anisotropic pressure models in neutron stars (NSs) is increasing their
compactness. Therefore, for the relatively soft NS equation of state (EOS), we can still obtain …

Bayesian inference of signatures of hyperons inside neutron stars

T Malik, C Providência - Physical Review D, 2022 - APS
The possible signatures of the presence of hyperons inside neutron stars are discussed
within a Bayesian inference framework applied to a set of models based on a density …

[HTML][HTML] Upper bound on the speed of sound in nuclear matter from transport

M Hippert, J Noronha, P Romatschke - Physics Letters B, 2025 - Elsevier
We point out that there is an upper bound on the speed of sound squared given by cs 2≤
0.781 valid for all known systems described by relativistic transient hydrodynamics where …

Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars

D Blaschke, A Ayriyan, DE Alvarez-Castillo… - Universe, 2020 - mdpi.com
We investigate the possibility that GW170817 was not the merger of two conventional
neutron stars (NS), but involved at least one if not two hybrid stars with a quark matter core …

[HTML][HTML] Can the PREX-2 and CREX results be understood by relativistic mean-field models with the astrophysical constraints?

T Miyatsu, MK Cheoun, K Kim, K Saito - Physics Letters B, 2023 - Elsevier
We construct new effective interactions using the relativistic mean-field models with the
isoscalar-and isovector-meson mixing, σ 2 δ 2 and ω μ ω μ ρ ν ρ ν. Taking into account the …

Systematic analysis of the impacts of symmetry energy parameters on neutron star properties

NK Patra, A Venneti, SMA Imam, A Mukherjee… - Physical Review C, 2023 - APS
The impacts of various symmetry energy parameters on the properties of neutron stars (NSs)
have been recently investigated, and the outcomes are at variance, as summarized in Table …