Structure of Hot Strange Quark Stars: an NJL Model Approach at Finite Temperature
In this paper, we investigated the thermodynamic properties of strange quark matter using the Nambu-Jona-Lasinio (NJL) model at finite temperatures where we considered the dynamical mass as the effective interaction between quarks. By considering the pressure of strange quark matter (SQM) at finite...
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| Veröffentlicht in: | Astrophysics 2019-06, Vol.62 (2), p.276-290 |
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| creator | Bordbar, G. H. Hosseini, R. Kayanikhoo, F. Poostforush, A. |
| description | In this paper, we investigated the thermodynamic properties of strange quark matter using the Nambu-Jona-Lasinio (NJL) model at finite temperatures where we considered the dynamical mass as the effective interaction between quarks. By considering the pressure of strange quark matter (SQM) at finite temperatures, we showed that the equation of state of this system gets stiffer with increasing temperature. In addition, we investigated the energy conditions and stability of the equation of state and showed that the equation of state of SQM satisfies the conditions of stability. Finally, we computed the structure properties of hot strange quark stars (SQS) including the gravitational mass, radius, Schwarzschild radius, average density, compactness, and gravitational redshift. Our calculations showed that in this model, the maximum mass and radius of SQS increase with increasing temperature. Furthermore it was shown that the average density of SQS is greater than the normal nuclear density, and it is an increasing function of temperature. We also discussed the temperature dependence of the maximum gravitational mass calculated by different methods. |
| doi_str_mv | 10.1007/s10511-019-09580-9 |
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Our calculations showed that in this model, the maximum mass and radius of SQS increase with increasing temperature. Furthermore it was shown that the average density of SQS is greater than the normal nuclear density, and it is an increasing function of temperature. 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Finally, we computed the structure properties of hot strange quark stars (SQS) including the gravitational mass, radius, Schwarzschild radius, average density, compactness, and gravitational redshift. Our calculations showed that in this model, the maximum mass and radius of SQS increase with increasing temperature. Furthermore it was shown that the average density of SQS is greater than the normal nuclear density, and it is an increasing function of temperature. 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H.</creatorcontrib><creatorcontrib>Hosseini, R.</creatorcontrib><creatorcontrib>Kayanikhoo, F.</creatorcontrib><creatorcontrib>Poostforush, A.</creatorcontrib><collection>CrossRef</collection><collection>Gale In Context: Science</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Astrophysics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bordbar, G. 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In addition, we investigated the energy conditions and stability of the equation of state and showed that the equation of state of SQM satisfies the conditions of stability. Finally, we computed the structure properties of hot strange quark stars (SQS) including the gravitational mass, radius, Schwarzschild radius, average density, compactness, and gravitational redshift. Our calculations showed that in this model, the maximum mass and radius of SQS increase with increasing temperature. Furthermore it was shown that the average density of SQS is greater than the normal nuclear density, and it is an increasing function of temperature. We also discussed the temperature dependence of the maximum gravitational mass calculated by different methods.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10511-019-09580-9</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Astronomy Astrophysics Astrophysics and Astroparticles Astrophysics and Cosmology Density Equations of state Gravitation Observations Observations and Techniques Physics Physics and Astronomy Quark stars Quarks Red shift Space Exploration and Astronautics Space Sciences (including Extraterrestrial Physics Stars Temperature Temperature dependence Thermodynamic properties |
| title | Structure of Hot Strange Quark Stars: an NJL Model Approach at Finite Temperature |
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