Core-corona decomposition of compact (neutron) stars compared to NICER data including XTE J1814-338
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910695830847488 |
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| author | Zöllner, Rico Kämpfer, Burkhard |
| author_facet | Zöllner, Rico Kämpfer, Burkhard |
| contents | A core-corona decomposition of compact (neutron) star models is compared to recent NICER data of masses and radii. It is in particular interesting to capture the outlier XTE~J1814-338. Instead of integrating the TOV equations from the center to surface, we follow here another pathway by accommodating all uncertainties of the equation(s) of state (EoS) at supra-nuclear density or/and an unknown dark matter admixture in a parameterization of the core by its radius $r_x$, the included mass $m_x$ and the pressure $p_x$ at $r_x$. The corona, which may be dubbed also envelope or halo or outer crust, is assumed to be of standard-model matter where the EoS is supposed to be faithfully known. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_08068 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Core-corona decomposition of compact (neutron) stars compared to NICER data including XTE J1814-338 Zöllner, Rico Kämpfer, Burkhard High Energy Astrophysical Phenomena High Energy Physics - Phenomenology A core-corona decomposition of compact (neutron) star models is compared to recent NICER data of masses and radii. It is in particular interesting to capture the outlier XTE~J1814-338. Instead of integrating the TOV equations from the center to surface, we follow here another pathway by accommodating all uncertainties of the equation(s) of state (EoS) at supra-nuclear density or/and an unknown dark matter admixture in a parameterization of the core by its radius $r_x$, the included mass $m_x$ and the pressure $p_x$ at $r_x$. The corona, which may be dubbed also envelope or halo or outer crust, is assumed to be of standard-model matter where the EoS is supposed to be faithfully known. |
| title | Core-corona decomposition of compact (neutron) stars compared to NICER data including XTE J1814-338 |
| topic | High Energy Astrophysical Phenomena High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.08068 |