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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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026932500262X |
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| Summary: | 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. |
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| ISSN: | 0370-2693 |