# Impact of the equation-of-state-gravity degeneracy on constraining the nuclear symmetry energy from astrophysical observables

@article{He2015ImpactOT, title={Impact of the equation-of-state-gravity degeneracy on constraining the nuclear symmetry energy from astrophysical observables}, author={Xiao-Tao He and Farrukh J. Fattoyev and Bao-An Li and William G. Newton}, journal={Physical Review C}, year={2015}, volume={91}, pages={015810} }

There is a degeneracy between the equation of state (EOS) of superdense neutron-rich nuclear matter and the strong-field gravity in understanding properties of neutron stars. While the EOS is still poorly known, there are also longstanding ambiguities in choosing Einstein's general relativity (GR) or alternative gravity theories in the not-so-well-tested strong-field regime. Besides the possible appearance of hyperons and new phases, the most uncertain part of the nucleonic EOS is currently the…

## 32 Citations

### Shedding Light on the EOS-Gravity Degeneracy and Constraining the Nuclear Symmetry Energy from the Gravitational Binding Energy of Neutron Stars

- Physics, Geology
- 2015

A thorough understanding of properties of neutron stars requires both a reliable knowledge of the equation of state (EOS) of super-dense nuclear matter and the strong-field gravity theories…

### Progress in Constraining Nuclear Symmetry Energy Using Neutron Star Observables Since GW170817

- PhysicsUniverse
- 2021

The density dependence of nuclear symmetry energy is among the most uncertain parts of the Equation of State (EOS) of dense neutron-rich nuclear matter. It is currently poorly known especially at…

### Towards understanding astrophysical effects of nuclear symmetry energy

- PhysicsThe European Physical Journal A
- 2019

Abstract.Determining the Equation of State (EOS) of dense neutron-rich nuclear matter is a shared goal of both nuclear physics and astrophysics. Except possible phase transitions, the density…

### Extracting nuclear symmetry energies at high densities from observations of neutron stars and gravitational waves

- PhysicsThe European Physical Journal A
- 2019

Abstract.By numerically inverting the Tolman-Oppenheimer-Volkov (TOV) equation using an explicitly isospin-dependent parametric Equation of State (EOS) of dense neutron-rich nucleonic matter, a…

### Modified TOV in gravity's rainbow: properties of neutron stars and dynamical stability conditions

- Physics
- 2015

In this paper, we consider a spherical symmetric metric to extract the hydrostatic equilibrium equation of stars in (3+1)-dimensional gravity's rainbow in the presence of cosmological constant. Then,…

### Neutron stars structure in the context of massive gravity

- Physics, Geology
- 2017

Motivated by the recent interests in spin−2 massive gravitons, we study the structure of neutron star in the context of massive gravity. The modifications of TOV equation in the presence of massive…

### Degeneracy in studying the supranuclear equation of state and modified gravity with neutron stars

- PhysicsXIAMEN-CUSTIPEN WORKSHOP ON THE EQUATION OF STATE OF DENSE NEUTRON-RICH MATTER IN THE ERA OF GRAVITATIONAL WAVE ASTRONOMY
- 2019

It is generally acknowledged that an extrapolation in physics from a well-known scale to an unknown scale is perilous. This prevents us from using laboratory experience to gain precise information…

### Constraint on energy-momentum squared gravity from neutron stars and its cosmological implications

- PhysicsPhysical Review D
- 2018

Deviations from the predictions of general relativity due to energy-momentum squared gravity (EMSG) are expected to become pronounced in the high density cores of neutron stars. We derive the…

### How Perturbative QCD Constrains the Equation of State at Neutron-Star Densities.

- PhysicsPhysical review letters
- 2022

We demonstrate in a general and analytic way how high-density information about the equation of state (EOS) of strongly interacting matter obtained using perturbative quantum chromodynamics…

### Contraction of cold neutron star due to in the presence a quark core

- PhysicsThe European Physical Journal C
- 2019

Motivated by importance of the existence of quark matter on structure of neutron star. For this purpose, we use a suitable equation of state (EoS) which include three different parts: (i) a layer of…

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