Finite temperature effects on g-modes of inviscid neutron stars
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866913037981581312 |
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| author | Morales-Zapien, David Jaikumar, Prashanth Klähn, Thomas |
| author_facet | Morales-Zapien, David Jaikumar, Prashanth Klähn, Thomas |
| contents | We study the effect of temperature on secular, compositional $g$-modes in the core of inviscid neutron stars. Using a chiral $SU(2)_f$ sigma model, we construct isentropic temperature profiles for hot and dense matter and find that the frequency of the global core $g$-mode's dependence on temperature is governed by the nuclear symmetry energy slope parameter $L$. As a result, the $g$-mode frequency of a warm neutron star can be either higher or lower than that of its cold counterpart, depending on $L$. Our results highlight the interplay of thermal effects and composition gradients, and demonstrate the potential of neutron star $g$-mode observations to constrain the density dependence of the symmetry energy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_11815 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Finite temperature effects on g-modes of inviscid neutron stars Morales-Zapien, David Jaikumar, Prashanth Klähn, Thomas High Energy Astrophysical Phenomena Solar and Stellar Astrophysics Nuclear Theory We study the effect of temperature on secular, compositional $g$-modes in the core of inviscid neutron stars. Using a chiral $SU(2)_f$ sigma model, we construct isentropic temperature profiles for hot and dense matter and find that the frequency of the global core $g$-mode's dependence on temperature is governed by the nuclear symmetry energy slope parameter $L$. As a result, the $g$-mode frequency of a warm neutron star can be either higher or lower than that of its cold counterpart, depending on $L$. Our results highlight the interplay of thermal effects and composition gradients, and demonstrate the potential of neutron star $g$-mode observations to constrain the density dependence of the symmetry energy. |
| title | Finite temperature effects on g-modes of inviscid neutron stars |
| topic | High Energy Astrophysical Phenomena Solar and Stellar Astrophysics Nuclear Theory |
| url | https://arxiv.org/abs/2604.11815 |