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https://hdl.handle.net/10316/113434
Title: | Strong magnetic fields and pasta phases revisited | Authors: | Scurto, Luigi Pais, Helena Gulminelli, Francesca |
Keywords: | Nuclear Theory; astro-ph.HE | Issue Date: | 19-Dec-2022 | Publisher: | American Physical Society | Project: | This work was partly supported by the FCT (Portugal) Projects No. 2022.06460.PTDC and UID/FIS/04564/2020, and by the IN2P3 Master Project NewMAC. L.S. acknowledges PhD Grant no. 2021.08779.BD (FCT, Portugal), and LPC-Caen for support. H.P. acknowledges her former Grant no. CEECIND/03092/2017 (FCT, Portugal) while at CFisUC, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal | Serial title, monograph or event: | Physical Review C | Volume: | 107 | Issue: | 4 | Abstract: | In this work, we compute the structure and composition of the inner crust of a neutron star in the presence of a strong magnetic field, such as it can be found in magnetars. To determine the geometry and characteristics of the crust inhomogeneities, we consider the compressible liquid drop model, where surface and Coulomb terms are included in the variational equations, and we compare our results with previous calculations based on more approximate treatments. For the equation of state (EoS), we consider two non-linear relativistic mean-field models with different slopes of the symmetry energy, and we show that the extension of the inhomogeneous region inside the star core due to the magnetic field strongly depends on the behavior of the symmetry energy in the crustal EoS. Finally, we argue that the extended spinodal instability observed in previous calculations can be related to the presence of small amplitude density fluctuations in the magnetar outer core, rather than to a thicker solid crust. The compressible liquid drop model formalism, while in overall agreement with the previous calculations, leads to a systematic suppression of the metastable solutions, thus allowing a more precise estimation of the crust-core transition density and pressure, and therefore a better estimation of the crustal radius. | Description: | 11 pages, 5 figures, 3 tables. Version published on Phys. Rev. C | URI: | https://hdl.handle.net/10316/113434 | ISSN: | 2469-9985 2469-9993 |
DOI: | 10.1103/PhysRevC.107.045806 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais I&D CFis - Artigos em Revistas Internacionais |
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Strong magnetic fields and pasta phases reexamined.pdf | 2.22 MB | Adobe PDF | View/Open |
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