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We develop new hyperon equation of state (EoS) tables for core-collapse supernova simulations and neutron stars. These EoS tables are based on a density-dependent relativistic hadron field theory where baryon-baryon interaction is mediated…

High Energy Astrophysical Phenomena · Physics 2015-03-03 Sarmistha Banik , Matthias Hempel , Debades Bandyopadhyay

To more precisely constrain the Equation of State (EOS) of supradense neutron-rich nuclear matter, future high-precision X-ray and gravitational wave observatories are proposed to measure the radii of neutron stars (NSs) with an accuracy…

High Energy Astrophysical Phenomena · Physics 2024-11-27 Bao-An Li , Xavier Grundler , Wen-Jie Xie , Nai-Bo Zhang

Bulk properties of cold and hot neutron stars (NSs) are studied on the basis of the hadron-quark crossover picture where a smooth transition from the hadronic phase to the quark phase takes place at finite baryon density. By using a…

Nuclear Theory · Physics 2016-04-20 Kota Masuda , Tetsuo Hatsuda , Tatsuyuki Takatsuka

Neutron-star radii provide useful information on the equation of state of neutron rich matter. Particularly interesting is the density dependence of the equation of state (EOS). For example, the softening of the EOS at high density, where…

Nuclear Theory · Physics 2009-11-07 J. Carriere , C. J. Horowitz , J. Piekarewicz

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

In recent years our understanding of the dense matter equation of state (EOS) of neutron stars has significantly improved by analyzing multimessenger data from radio/X-ray pulsars, gravitational wave events, and from nuclear physics…

High Energy Astrophysical Phenomena · Physics 2021-09-28 G. Raaijmakers , S. K. Greif , K. Hebeler , T. Hinderer , S. Nissanke , A. Schwenk , T. E. Riley , A. L. Watts , J. M. Lattimer , W. C. G. Ho

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 III of Phys. Rev. D 106, 063005 (2022). We have…

Nuclear Theory · Physics 2023-05-19 N. K. Patra , Anagh Venneti , Sk Md Adil Imam , Arunava Mukherjee , B. K. Agrawal

We present an updated general purpose nuclear equation of state (EoS) for use in simulations of core-collapse supernovae, neutron star mergers and black hole collapse. This EoS is formulated in the context of Density Functional Theory (DFT)…

The Equation of State (EOS) of dense strongly-interacting matter can be probed by astrophysical observations of neutron stars (NS), such as X-ray detections of pulsars or the measurement of the tidal deformability of NSs during the inspiral…

High Energy Astrophysical Phenomena · Physics 2023-11-09 Maximiliano Ujevic , Rahul Somasundaram , Tim Dietrich , Jerome Margueron , Ingo Tews

The determination of the equation of state (EOS) of a neutron star (NS) and its maximum mass is very important for understanding the formation and properties of NSs under extreme conditions, but they remain open questions. Short-duration…

High Energy Astrophysical Phenomena · Physics 2025-02-25 Jun-Xiang Huang , Hou-Jun Lü , En-Wei Liang

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

Neutron stars are the dense and highly magnetic relics of supernova explosions of massive stars. The quest to constrain the Equation of State (EoS) of ultra-dense matter and thereby probe the behavior of matter inside neutron stars, is one…

High Energy Astrophysical Phenomena · Physics 2024-04-09 Alessio Marino , Clara Dehman , Konstantinos Kovlakas , Nanda Rea , Jose A. Pons , D. Viganò

The increasing richness of data related to cold dense matter, from laboratory experiments to neutron-star observations, requires a framework for constraining the properties of such matter that makes use of all relevant information. Here, we…

High Energy Astrophysical Phenomena · Physics 2020-01-08 M. Coleman Miller , Cecilia Chirenti , Frederick K. Lamb

Inasmuch as the hydrostatic structure of interior neutron stars uniquely depends on the equation of state (EOS), the inverse constraints on EOS from astrophysical observation have been important methods to reveal the properties of the…

Nuclear Theory · Physics 2019-05-22 Houyuan Chen , Dehua Wen , Na Zhang

We propose a non-parametric approach to construct the statistical equation of state (EOS) continuously from the nuclear crust to the asymptotic-freedom regime. Driven by the observationally required stiffening to support two-solar-mass…

High Energy Astrophysical Phenomena · Physics 2026-05-12 Yong-Jia Huang , Shao-Peng Tang , Yi-Zhong Fan

Understanding the equation of state (EOS) of neutron stars (NSs) is a fundamental challenge in astrophysics and nuclear physics. A first-order phase transition (FOPT) at high densities could lead to the formation of a quark core,…

High Energy Astrophysical Phenomena · Physics 2025-02-11 Zuhua Ji , Jiarui Chen

Neutron stars provide a unique laboratory for studying matter at extreme pressures and densities. While there is no direct way to explore their interior structure, X-rays emitted from these stars can indirectly provide clues to the equation…

High Energy Astrophysical Phenomena · Physics 2023-02-15 Delaney Farrell , Pierre Baldi , Jordan Ott , Aishik Ghosh , Andrew W. Steiner , Atharva Kavitkar , Lee Lindblom , Daniel Whiteson , Fridolin Weber

The TOV equations govern the radial evolution of pressure and energy density in static neutron stars (NSs) in hydrodynamical equilibrium. Using the reduced pressure and energy density with respect to the NS central energy density, the…

High Energy Astrophysical Phenomena · Physics 2025-03-19 Bao-Jun Cai , Bao-An Li

The equation of state (EOS) of dense matter has been a long-sought goal of nuclear physics. Equations of state generate unique mass versus radius (M-R) relations for neutron stars, the ultra-dense remnants of stellar evolution. In this…

Nuclear Theory · Physics 2015-06-05 Andrew W. Steiner , James M. Lattimer , Edward F. Brown

Muons in neutron stars (NSs) play especially important roles in addressing several interesting new physics questions associated with detecting as well as understanding interactions and astrophysical effects of muonphilic dark matter…

High Energy Astrophysical Phenomena · Physics 2020-04-16 Nai-Bo Zhang , Bao-An Li