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 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.
Authors
- N. Chamel (ORCID: https://orcid.org/0000-0003-3222-0115)
- Nikolai N. Shchechilin (ORCID: https://orcid.org/0000-0001-5827-8097)
- Guilherme Grams (ORCID: https://orcid.org/0000-0002-8635-383X)
- F. Gulminelli (ORCID: https://orcid.org/0000-0003-4354-2849)
- A. F. Fantina (ORCID: https://orcid.org/0000-0003-2225-4100)
- Théau Diverrès
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université Libre de Bruxelles (BE)
- University of Potsdam (DE)
- École Nationale Supérieure d'Ingénieurs de Caen (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Grand Accélérateur National d'Ions Lourds (FR)
- Université de Caen Normandie (FR)
Publication Details
- Journal
- Universe
- Published
- 2025-05-27
- DOI
- https://doi.org/10.3390/universe11060172
- Citations
- 2
- Primary Topic
- Pulsars and Gravitational Waves Research
- Type
- article
- Field-Weighted Citation Impact
- 2.31
Funders
- Fonds De La Recherche Scientifique - FNRS
- Fonds Wetenschappelijk Onderzoek
- Centre National de la Recherche Scientifique