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The question of correlations among empirical equation of state (EoS) parameters constrained by nuclear observables is addressed in a fully empirical meta-modeling approach. A recently proposed meta-modeling for the nuclear EoS in nuclear…

Nuclear Theory · Physics 2017-12-27 D. Chatterjee , F. Gulminelli , Ad. R. Raduta , J. Margueron

The concept of quarkyonic matter presents a promising alternative to the conventional models used to describe high-density matter and provides a more nuanced and detailed understanding of the properties of matter under extreme conditions…

Nuclear Theory · Physics 2023-09-19 Ankit Kumar , Debabrata Dey , Shamim Haque , Ritam Mallick , S. K. Patra

Equation-of-state (EOS) models underpin numerical simulations at the core of research in high energy density physics, inertial confinement fusion, laboratory astrophysics, and elsewhere. In these applications EOS models are needed that span…

Data Analysis, Statistics and Probability · Physics 2022-10-28 Jim A Gaffney , Lin Yang , Suzanne Ali

We describe a software package, TomOpt, developed to optimise the geometrical layout and specifications of detectors designed for tomography by scattering of cosmic-ray muons. The software exploits differentiable programming for the…

We generate a new complete equation of state (EOS) of nuclear matter for a wide range of temperatures, densities, and proton fractions ready for use in astrophysical simulations of supernovae and neutron star mergers. Our previous two…

Solar and Stellar Astrophysics · Physics 2015-03-17 G. Shen , C. J. Horowitz , S. Teige

The strong-field gravity in General Relativity (GR) realized in neutron stars (NSs) renders the Equation of State (EOS) $P(\varepsilon)$ of supradense neutron star (NS) matter to be essentially nonlinear and refines the upper bound for…

High Energy Astrophysical Phenomena · Physics 2024-12-12 Bao-Jun Cai , Bao-An Li

We perform a systematic analysis of neutron star radius constraints from five quiescent low-mass X-ray binaries and examine how they depend on measurements of their distances and amounts of intervening absorbing material, as well as their…

High Energy Astrophysical Phenomena · Physics 2014-03-20 James M. Lattimer , Andrew W. Steiner

We have attempted to mitigate the challenge of connecting the neutron star (NS) properties with the nuclear matter parameters that describe equations of state (EoSs). The efforts to correlate various neutron star properties with individual…

Nuclear Theory · Physics 2023-12-13 N. K. Patra , Prafulla Saxena , B. K. Agrawal , T. K. Jha

Given an Equation of State (EOS) for neutron star (NS) matter, there is a unique mass-radius sequence characterized by a maximum mass $M_{\rm{NS}}^{\max}$ at radius $R_{\max}$. We first show analytically that the $M_{\rm{NS}}^{\max}$ and…

Nuclear Theory · Physics 2023-07-27 Bao-Jun Cai , Bao-An Li , Zhen Zhang

A mean field calculation is carried out to obtain the equation of state (EoS) of nuclear matter from a density dependent M3Y interaction (DDM3Y). The energy per nucleon is minimized to obtain ground state of the symmetric nuclear matter…

Nuclear Theory · Physics 2008-09-04 D. N. Basu , P. Roy Chowdhury , C. Samanta

The equation of state (EOS) of dense matter plays an important role in the supernova phenomenon, the structure of neutron stars, and in the mergers of compact objects (neutron stars and black holes). During the collapse phase of a…

Astrophysics · Physics 2010-04-06 James M. Lattimer , Madappa Prakash

We present CONAN (COde for exoplaNet ANalysis), an open-source Python package for comprehensive analyses of exoplanetary systems. It provides a unified Bayesian framework to simultaneously analyze diverse exoplanet datasets to derive global…

Instrumentation and Methods for Astrophysics · Physics 2025-08-29 Babatunde Akinsanmi , Monika Lendl , Andreas Krenn

PyUnfold is a Python package for incorporating imperfections of the measurement process into a data analysis pipeline. In an ideal world, we would have access to the perfect detector: an apparatus that makes no error in measuring a desired…

Data Analysis, Statistics and Probability · Physics 2018-06-12 James Bourbeau , Zigfried Hampel-Arias

A pure nucleonic equation of state (EoS) for beta equilibrated charge neutral neutron star (NS) matter is determined using density dependent effective NN interaction. This EoS is found to satisfy both the constraints from the observed…

Nuclear Theory · Physics 2011-05-11 Partha Roy Chowdhury

We construct the equation of state (EOS) of dense matter covering a wide range of temperature, proton fraction, and density for the use of core-collapse supernova simulations. The study is based on the relativistic mean-field (RMF) theory,…

High Energy Astrophysical Phenomena · Physics 2012-03-26 H. Shen , H. Toki , K. Oyamatsu , K. Sumiyoshi

We investigate the constraints on the neutron star equation of state (EoS) and nuclear properties achievable with third-generation gravitational wave detectors using the Fisher information matrix approach within the relativistic mean field…

High Energy Astrophysical Phenomena · Physics 2026-05-29 Zhenyu Zhu , Richard O'Shaughnessy

Neutron stars and their mergers provide the highest-density regime in which Einstein's equations in full (with a matter source) can be tested against modified theories of gravity. But doing so requires a priori knowledge of the Equation of…

High Energy Physics - Phenomenology · Physics 2022-02-09 Eva Lope-Oter , Felipe J. Llanes-Estrada

Focused optical fields are key to a multitude of applications involving light-matter interactions, such as optical microscopy, single-molecule spectroscopy, optical tweezers, lithography, or quantum coherent control. A detailed vectorial…

Optics · Physics 2022-03-14 Fernando Caprile , Luciano A. Masullo , Fernando D. Stefani

Based on the distribution of tidal deformabilities and component masses of binary neutron star merger GW170817, the parametric equation of states (EOS) are employed to probe the nuclear symmetry energy and the properties of neutron star. To…

Nuclear Theory · Physics 2021-01-22 Yuxi Li , Houyuan Chen , Dehua Wen , Jing Zhang

Using an explicitly isospin-dependent parametric Equation of State (EOS) for the core of neutron stars (NSs) within the Bayesian statistical approach, we infer the EOS parameters of super-dense neutron-rich nuclear matter from three sets of…

High Energy Astrophysical Phenomena · Physics 2020-08-07 Wen-Jie Xie , Bao-An Li