Strange quark star in dilaton gravity

In this work, we first obtain the hydrostatic equilibrium equation in dilaton gravity. Then, we examine some of the structural characteristics of a strange quark star in dilaton gravity in the context of Einstein gravity. We show that the variations of dilaton parameter do not affect the maximum mas...

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Bibliographic Details
Published inResearch in astronomy and astrophysics Vol. 19; no. 6; pp. 78 - 91
Main Authors Peivand, Alireza, Naficy, Kazem, Bordbar, Gholam Hossein
Format Journal Article
LanguageEnglish
Published Beijing National Astronomical Observatories, CAS and IOP Publishing Ltd 01.06.2019
IOP Publishing
Subjects
Cosmological constant
dense matter
Dilatons
equation of state
Equilibrium equations
Gravitation
Gravitational effects
Parameters
Quark stars
Quarks
Red shift
stars: fundamental parameters (masses, radii)
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Summary:In this work, we first obtain the hydrostatic equilibrium equation in dilaton gravity. Then, we examine some of the structural characteristics of a strange quark star in dilaton gravity in the context of Einstein gravity. We show that the variations of dilaton parameter do not affect the maximum mass, but variations in the cosmological constant lead to changes in the structural characteristics of the quark star. We investigate the stability of strange quark stars by applying the MIT bag model with dilaton gravity. We also provide limiting values for the dilaton field parameter and cosmological constant. We also study the effects of dilaton gravity on the other properties of a quark star such as the mean density and gravitational redshift. We conclude that the last reported value for the cosmological constant does not affect the maximum mass of a strange quark star.
ISSN:1674-4527
DOI:10.1088/1674-4527/19/6/78