Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements
Recent advancements in astrophysical observations of compact stars, particularly the new and updated NICER constraints, have provided mass-radius (M-R) data for pulsars spanning masses from 1 to 2M⊙. These data offer a unique opportunity to test modern theories of dense matter using multi-messenger...
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Elsevier
2025-06-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026932500262X |
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| author | Jia-Jie Li Yu Tian Armen Sedrakian |
| author_facet | Jia-Jie Li Yu Tian Armen Sedrakian |
| author_sort | Jia-Jie Li |
| collection | DOAJ |
| description | Recent advancements in astrophysical observations of compact stars, particularly the new and updated NICER constraints, have provided mass-radius (M-R) data for pulsars spanning masses from 1 to 2M⊙. These data offer a unique opportunity to test modern theories of dense matter using multi-messenger constraints. Covariant density functional (CDF) models of nuclear matter, which capture a broad range of nuclear and astrophysical phenomena, provide a robust theoretical framework to interpret these observations. This study applies the Bayesian framework to a class of CDF models with density-dependent meson-nucleon couplings, specifically those based on nucleonic degrees of freedom. By incorporating the latest multi-messenger constraints, we impose tighter limits on the parameter space of these models and assess their consistency with observational data. Our analysis advances previous efforts by refining the density-dependence parameterization and integrating recent M-R ellipses. This enables more stringent evaluations of dense matter models in light of new astrophysical observations. |
| format | Article |
| id | doaj-art-c41f3c198c644b74be3cb0c29b44f9fb |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-c41f3c198c644b74be3cb0c29b44f9fb2025-08-20T03:48:51ZengElsevierPhysics Letters B0370-26932025-06-0186513950110.1016/j.physletb.2025.139501Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurementsJia-Jie Li0Yu Tian1Armen Sedrakian2School of Physical Science and Technology, Southwest University, Chongqing 400715, China; Corresponding authors.School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaFrankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany; Institute of Theoretical Physics, University of Wroclaw, 50-204 Wroclaw, Poland; Corresponding authors.Recent advancements in astrophysical observations of compact stars, particularly the new and updated NICER constraints, have provided mass-radius (M-R) data for pulsars spanning masses from 1 to 2M⊙. These data offer a unique opportunity to test modern theories of dense matter using multi-messenger constraints. Covariant density functional (CDF) models of nuclear matter, which capture a broad range of nuclear and astrophysical phenomena, provide a robust theoretical framework to interpret these observations. This study applies the Bayesian framework to a class of CDF models with density-dependent meson-nucleon couplings, specifically those based on nucleonic degrees of freedom. By incorporating the latest multi-messenger constraints, we impose tighter limits on the parameter space of these models and assess their consistency with observational data. Our analysis advances previous efforts by refining the density-dependence parameterization and integrating recent M-R ellipses. This enables more stringent evaluations of dense matter models in light of new astrophysical observations.http://www.sciencedirect.com/science/article/pii/S037026932500262XEquation of stateCompact starsCovariant density functionalBayesian inference |
| spellingShingle | Jia-Jie Li Yu Tian Armen Sedrakian Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements Physics Letters B Equation of state Compact stars Covariant density functional Bayesian inference |
| title | Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements |
| title_full | Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements |
| title_fullStr | Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements |
| title_full_unstemmed | Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements |
| title_short | Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements |
| title_sort | bayesian constraints on covariant density functional equations of state of compact stars with new nicer mass radius measurements |
| topic | Equation of state Compact stars Covariant density functional Bayesian inference |
| url | http://www.sciencedirect.com/science/article/pii/S037026932500262X |
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