Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches
We investigate the effects of temperature on the properties of the inner crust of a non-accreting neutron star. To this aim, we employ two different treatments: the compressible liquid drop model (CLDM) and the temperature-dependent extended Thomas–Fermi (TETF) method. Our systematic comparison show...
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2025-05-01
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| author | Guilherme Grams Nikolai N. Shchechilin Théau Diverrès Anthea F. Fantina Nicolas Chamel Francesca Gulminelli |
| author_facet | Guilherme Grams Nikolai N. Shchechilin Théau Diverrès Anthea F. Fantina Nicolas Chamel Francesca Gulminelli |
| author_sort | Guilherme Grams |
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| description | We investigate the effects of temperature on the properties of the inner crust of a non-accreting neutron star. To this aim, we employ two different treatments: the compressible liquid drop model (CLDM) and the temperature-dependent extended Thomas–Fermi (TETF) method. Our systematic comparison shows an agreement between the two methods on their predictions for the crust thermodynamic properties. We find that the CLDM description can also reproduce reasonably well the TETF composition especially if the surface energy is optimized on the ETF calculation. However, the neglect of neutron skin in CLDM leads to an overestimation of the proton radii. |
| format | Article |
| id | doaj-art-e6ec35e0763b435781034149aa4df44e |
| institution | Kabale University |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-05-01 |
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| spelling | doaj-art-e6ec35e0763b435781034149aa4df44e2025-08-20T03:32:32ZengMDPI AGUniverse2218-19972025-05-0111617210.3390/universe11060172Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi ApproachesGuilherme Grams0Nikolai N. Shchechilin1Théau Diverrès2Anthea F. Fantina3Nicolas Chamel4Francesca Gulminelli5Institut d’Astronomie et d’Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, BelgiumInstitut d’Astronomie et d’Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, BelgiumGrand Accélérateur National d’Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, FranceInstitut d’Astronomie et d’Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, BelgiumInstitut d’Astronomie et d’Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, BelgiumUniversité de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen UMR6534, 14000 Caen, FranceWe investigate the effects of temperature on the properties of the inner crust of a non-accreting neutron star. To this aim, we employ two different treatments: the compressible liquid drop model (CLDM) and the temperature-dependent extended Thomas–Fermi (TETF) method. Our systematic comparison shows an agreement between the two methods on their predictions for the crust thermodynamic properties. We find that the CLDM description can also reproduce reasonably well the TETF composition especially if the surface energy is optimized on the ETF calculation. However, the neglect of neutron skin in CLDM leads to an overestimation of the proton radii.https://www.mdpi.com/2218-1997/11/6/172neutron starsfinite temperature equation of stateclusterized matter |
| spellingShingle | Guilherme Grams Nikolai N. Shchechilin Théau Diverrès Anthea F. Fantina Nicolas Chamel Francesca Gulminelli Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches Universe neutron stars finite temperature equation of state clusterized matter |
| title | Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches |
| title_full | Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches |
| title_fullStr | Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches |
| title_full_unstemmed | Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches |
| title_short | Neutron Star Inner Crust at Finite Temperatures: A Comparison Between Compressible Liquid Drop and Extended Thomas–Fermi Approaches |
| title_sort | neutron star inner crust at finite temperatures a comparison between compressible liquid drop and extended thomas fermi approaches |
| topic | neutron stars finite temperature equation of state clusterized matter |
| url | https://www.mdpi.com/2218-1997/11/6/172 |
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