Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics
At the ultrahigh densities existing in the core of neutron stars (NSs), it is expected that a phase transition from baryonic to deconfined quark matter may occur. Such a phase transition would affect the underlying equation of state (EoS) as well as the observable astrophysical properties of NSs. Co...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acac31 |
| _version_ | 1827830765466943488 |
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| author | Swarnim Shirke Suprovo Ghosh Debarati Chatterjee |
| author_facet | Swarnim Shirke Suprovo Ghosh Debarati Chatterjee |
| author_sort | Swarnim Shirke |
| collection | DOAJ |
| description | At the ultrahigh densities existing in the core of neutron stars (NSs), it is expected that a phase transition from baryonic to deconfined quark matter may occur. Such a phase transition would affect the underlying equation of state (EoS) as well as the observable astrophysical properties of NSs. Comparison of EoS model predictions with astronomical data from multimessenger signals then provides us an opportunity to probe the behavior of dense matter. In this work, we restrict the allowed parameter space of EoS models in NSs for both nucleonic (relativistic mean field model) and quark matter (MIT bag model) sectors by imposing state-of-the-art constraints from nuclear calculations, multimessenger astrophysical data, and perturbative quantum chromodynamics (pQCD). We systematically investigate the effect of each constraint on the parameter space of uncertainties using a cutoff filter scheme, as well as the correlations among the parameters and with NS astrophysical observables. Using the constraints, we obtain limits for maximum NS mass, maximum central density, as well as for NS radii and tidal deformability. Although pQCD constraints are only effective at very high densities, they significantly reduce the parameter space of the quark model. We also conclude that astrophysical data supports high values of the bag parameter B and disfavors the existence of a pure quark matter core in hybrid stars. |
| first_indexed | 2024-03-12T04:34:02Z |
| format | Article |
| id | doaj.art-9d2f514eb0c64451b5ed0bf1099d1018 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:34:02Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-9d2f514eb0c64451b5ed0bf1099d10182023-09-03T09:58:15ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-019441710.3847/1538-4357/acac31Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary PhysicsSwarnim Shirke0https://orcid.org/0000-0001-8604-5362Suprovo Ghosh1https://orcid.org/0000-0002-1656-9870Debarati Chatterjee2https://orcid.org/0000-0002-0995-2329Inter-University Centre for Astronomy and Astrophysics , Post Bag 4, Ganeshkhind, Pune 411 007, India ; debarati@iucaa.inInter-University Centre for Astronomy and Astrophysics , Post Bag 4, Ganeshkhind, Pune 411 007, India ; debarati@iucaa.inInter-University Centre for Astronomy and Astrophysics , Post Bag 4, Ganeshkhind, Pune 411 007, India ; debarati@iucaa.inAt the ultrahigh densities existing in the core of neutron stars (NSs), it is expected that a phase transition from baryonic to deconfined quark matter may occur. Such a phase transition would affect the underlying equation of state (EoS) as well as the observable astrophysical properties of NSs. Comparison of EoS model predictions with astronomical data from multimessenger signals then provides us an opportunity to probe the behavior of dense matter. In this work, we restrict the allowed parameter space of EoS models in NSs for both nucleonic (relativistic mean field model) and quark matter (MIT bag model) sectors by imposing state-of-the-art constraints from nuclear calculations, multimessenger astrophysical data, and perturbative quantum chromodynamics (pQCD). We systematically investigate the effect of each constraint on the parameter space of uncertainties using a cutoff filter scheme, as well as the correlations among the parameters and with NS astrophysical observables. Using the constraints, we obtain limits for maximum NS mass, maximum central density, as well as for NS radii and tidal deformability. Although pQCD constraints are only effective at very high densities, they significantly reduce the parameter space of the quark model. We also conclude that astrophysical data supports high values of the bag parameter B and disfavors the existence of a pure quark matter core in hybrid stars.https://doi.org/10.3847/1538-4357/acac31Neutron starsNeutron star coresGravitational wavesHigh energy astrophysicsParticle astrophysics |
| spellingShingle | Swarnim Shirke Suprovo Ghosh Debarati Chatterjee Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics The Astrophysical Journal Neutron stars Neutron star cores Gravitational waves High energy astrophysics Particle astrophysics |
| title | Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics |
| title_full | Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics |
| title_fullStr | Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics |
| title_full_unstemmed | Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics |
| title_short | Constraining the Equation of State of Hybrid Stars Using Recent Information from Multidisciplinary Physics |
| title_sort | constraining the equation of state of hybrid stars using recent information from multidisciplinary physics |
| topic | Neutron stars Neutron star cores Gravitational waves High energy astrophysics Particle astrophysics |
| url | https://doi.org/10.3847/1538-4357/acac31 |
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