On the magnetic field evolution time-scale in superconducting neutron star cores
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http://hdl.handle.net/10045/68923
Títol: | On the magnetic field evolution time-scale in superconducting neutron star cores |
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Autors: | Passamonti, Andrea | Akgün, Taner | Pons, José A. | Miralles, Juan A. |
Grups d'investigació o GITE: | Astrofísica Relativista |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Física Aplicada |
Paraules clau: | Stars: evolution | Stars: magnetars | Stars: magnetic field | Stars: neutron |
Àrees de coneixement: | Astronomía y Astrofísica |
Data de publicació: | 15-de maig-2017 |
Editor: | Oxford University Press |
Citació bibliogràfica: | Monthly Notices of the Royal Astronomical Society. 2017, 469(4): 4979-4984. doi:10.1093/mnras/stx1192 |
Resum: | We revisit the various approximations employed to study the long-term evolution of the magnetic field in neutron star cores and discuss their limitations and possible improvements. A recent controversy on the correct form of the induction equation and the relevant evolution time-scale in superconducting neutron star cores is addressed and clarified. We show that this ambiguity in the estimation of time-scales arises as a consequence of nominally large terms that appear in the induction equation, but which are, in fact, mostly irrotational. This subtlety leads to a discrepancy by many orders of magnitude when velocity fields are absent or ignored. Even when internal velocity fields are accounted for, only the solenoidal part of the electric field contributes to the induction equation, which can be substantially smaller than the irrotational part. We also argue that stationary velocity fields must be incorporated in the slow evolution of the magnetic field as the next level of approximation. |
Patrocinadors: | AP acknowledges support from the European Union under the Marie Sklodowska Curie Actions Individual Fellowship, grant agreement no 656370. This work is supported in part by the Spanish MINECO grant AYA2015-66899-C2-2-P, and by the New Compstar COST action MP1304. |
URI: | http://hdl.handle.net/10045/68923 |
ISSN: | 0035-8711 (Print) | 1365-2966 (Online) |
DOI: | 10.1093/mnras/stx1192 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1093/mnras/stx1192 |
Apareix a la col·lecció: | INV - Astrofísica Relativista - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2017_Passamonti_etal_MNRAS.pdf | 144,29 kB | Adobe PDF | Obrir Vista prèvia | |
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