Tidal Deformability of Neutron Stars in Unimodular Gravity

Yang, Ruixin; Xie, Fei; Liu, Daojun

doi:10.48550/arxiv.2211.00278

Cited by 1 publication

(2 citation statements)

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“…For some recent relevant work on the stability properties and perturbations of neutron stars in scalar-tensor and unimodular gravity, see Refs. [119] and [120] respectively.…”

Section: A Results Of the Numerical Analysismentioning

confidence: 99%

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Static neutron stars perspective of quadratic and induced inflationary attractor scalar-tensor theories

Oikonomou

2023

Class. Quantum Grav.

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This study focuses on the static neutron star perspective for twotypes of cosmological inflationary attractor theories, namely theinduced inflationary attractors and the quadratic inflationaryattractors. The two cosmological models can be discriminatedcosmologically, since one of the two does not provide a viableinflationary phenomenology, thus in this paper we investigate thepredictions of these theories for static neutron stars, mainlyfocusing on the mass and radii of neutron stars. We aim todemonstrate that although the models have different inflationaryphenomenology, the neutron star phenomenology predictions of thetwo models are quite similar. We solve numerically theTolman-Oppenheimer-Volkoff equations in the Einstein frame using apowerful double shooting numerical technique, and after derivingthe mass-radius graphs for three types of polytropic equations ofstate, we derive the Jordan frame mass and radii. With regard theequations of state we use polytropic equation of state with thesmall density part being either the WFF1, the APR or theintermediate stiffness equation of state SLy. The results of ourmodels will be confronted with quite stringent recently developedconstraints on the radius of neutron stars with specific mass. Aswe show, the only equation of state which provides resultscompatible with the constraints is the SLy, for both the quadraticand induced inflation attractors. Thus nowadays, scalar-tensordescriptions of neutron stars are quite scrutinized due to thegrowing number of constraining observations, which eventually mayalso constrain theories of inflation.

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“…For some recent relevant work on the stability properties and perturbations of neutron stars in scalar-tensor and unimodular gravity, see Refs. [119] and [120] respectively.…”

Section: A Results Of the Numerical Analysismentioning

confidence: 99%

“…This is a non-trivial task and could be the subject of a distinct article for the various distinct inflationary attractors. For some recent relevant work on the stability properties and perturbations of neutron stars in scalar-tensor and unimodular gravity, see [119] and [120] respectively.…”

Section: Results Of the Numerical Analysismentioning

confidence: 99%

Static neutron stars perspective of quadratic and induced inflationary attractor scalar-tensor theories

Oikonomou

2023

Class. Quantum Grav.

View full text Add to dashboard Cite

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Tidal Deformability of Neutron Stars in Unimodular Gravity

Abstract: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).

Cited by 1 publication

References 34 publications

Static neutron stars perspective of quadratic and induced inflationary attractor scalar-tensor theories

Static neutron stars perspective of quadratic and induced inflationary attractor scalar-tensor theories

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