Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model
Abstract In this study, we extend the MIT bag model by incorporating the vector interaction among quarks and introducing a density-dependent bag pressure. Then we proceed to investigate the thermodynamic properties of strange quark matter (SQM) and pure up-down quark matter (udQM) in quark stars (QS...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13788-9 |
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| author | Min Ju Pengcheng Chu Xuhao Wu He Liu |
| author_facet | Min Ju Pengcheng Chu Xuhao Wu He Liu |
| author_sort | Min Ju |
| collection | DOAJ |
| description | Abstract In this study, we extend the MIT bag model by incorporating the vector interaction among quarks and introducing a density-dependent bag pressure. Then we proceed to investigate the thermodynamic properties of strange quark matter (SQM) and pure up-down quark matter (udQM) in quark stars (QSs). Our findings demonstrate that the density dependence of bag pressure $$B(n_b)$$ B ( n b ) and the vector interaction $$G_V$$ G V among quarks can significantly stiffen the equation of state (EOS) for both SQM and udQM which allows for the description of massive compact stars such as those observed in GW190814 and PSR J0740+6620 as plausible candidates for QSs. Ultimately, we derived a series of mass–radius relations of QS based on several combinations of ( $$B_{as}$$ B as , $$\beta $$ β ). Our results support the hypothesis that HESS J1731-347 is a quark star. |
| format | Article |
| id | doaj-art-ea1f4dc7ee6948b991ed21a782b87380 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-ea1f4dc7ee6948b991ed21a782b873802025-01-26T12:49:34ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-01-0185111210.1140/epjc/s10052-025-13788-9Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag modelMin Ju0Pengcheng Chu1Xuhao Wu2He Liu3School of Science, China University of Petroleum (East China)The Research Center for Theoretical Physics, Science School, Qingdao University of TechnologyKey Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan UniversityThe Research Center for Theoretical Physics, Science School, Qingdao University of TechnologyAbstract In this study, we extend the MIT bag model by incorporating the vector interaction among quarks and introducing a density-dependent bag pressure. Then we proceed to investigate the thermodynamic properties of strange quark matter (SQM) and pure up-down quark matter (udQM) in quark stars (QSs). Our findings demonstrate that the density dependence of bag pressure $$B(n_b)$$ B ( n b ) and the vector interaction $$G_V$$ G V among quarks can significantly stiffen the equation of state (EOS) for both SQM and udQM which allows for the description of massive compact stars such as those observed in GW190814 and PSR J0740+6620 as plausible candidates for QSs. Ultimately, we derived a series of mass–radius relations of QS based on several combinations of ( $$B_{as}$$ B as , $$\beta $$ β ). Our results support the hypothesis that HESS J1731-347 is a quark star.https://doi.org/10.1140/epjc/s10052-025-13788-9 |
| spellingShingle | Min Ju Pengcheng Chu Xuhao Wu He Liu Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model European Physical Journal C: Particles and Fields |
| title | Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model |
| title_full | Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model |
| title_fullStr | Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model |
| title_full_unstemmed | Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model |
| title_short | Hess J1731-347 is likely a quark star based on the density-dependent vMIT bag model |
| title_sort | hess j1731 347 is likely a quark star based on the density dependent vmit bag model |
| url | https://doi.org/10.1140/epjc/s10052-025-13788-9 |
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