Constraining twin stars with cold neutron star cooling data
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arXiv
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| Format: | Preprint |
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2024
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| author | Mendes, Melissa Christian, Jan-Erik Fattoyev, Farrukh J. Schaffner-Bielich, Jürgen |
| author_facet | Mendes, Melissa Christian, Jan-Erik Fattoyev, Farrukh J. Schaffner-Bielich, Jürgen |
| contents | We investigate the influence of a phase transition from hadronic matter to a deconfined quark phase inside a neutron star on its cooling behaviour including the appearance of twin star solutions in the mass-radius diagram. We find that while the inferred neutrino luminosity of cold transiently-accreting star in MXB $1659\text{-}29$ is reproduced in all of the constructed twin star models, the luminosity of a colder source, the neutron star in SAX J$1808.4\text{-}3658$, cannot be described by equations of state with quark-hadron transition densities below $1.7$ saturation density, suggesting that twin stars with such low density transitions to the quark phase are not realized in nature. We also discuss how constraints to the quark-hadron phase transition density are strongly dependent on the cooling effectiveness of neutrino reactions in the quark phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_05287 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Constraining twin stars with cold neutron star cooling data Mendes, Melissa Christian, Jan-Erik Fattoyev, Farrukh J. Schaffner-Bielich, Jürgen High Energy Astrophysical Phenomena Nuclear Theory We investigate the influence of a phase transition from hadronic matter to a deconfined quark phase inside a neutron star on its cooling behaviour including the appearance of twin star solutions in the mass-radius diagram. We find that while the inferred neutrino luminosity of cold transiently-accreting star in MXB $1659\text{-}29$ is reproduced in all of the constructed twin star models, the luminosity of a colder source, the neutron star in SAX J$1808.4\text{-}3658$, cannot be described by equations of state with quark-hadron transition densities below $1.7$ saturation density, suggesting that twin stars with such low density transitions to the quark phase are not realized in nature. We also discuss how constraints to the quark-hadron phase transition density are strongly dependent on the cooling effectiveness of neutrino reactions in the quark phase. |
| title | Constraining twin stars with cold neutron star cooling data |
| topic | High Energy Astrophysical Phenomena Nuclear Theory |
| url | https://arxiv.org/abs/2408.05287 |