Magnetic Dynamo Caused by Axions in Neutron Stars
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Título: | Magnetic Dynamo Caused by Axions in Neutron Stars |
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Autor/es: | Anzuini, Filippo | Pons, José A. | Gómez-Bañón, Antonio | Lasky, Paul D. | Bianchini, Federico | Melatos, Andrew |
Grupo/s de investigación o GITE: | Astrofísica Relativista |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Neutron stars | Axions | Magnetic dynamo |
Fecha de publicación: | 15-feb-2023 |
Editor: | American Physical Society |
Cita bibliográfica: | Physical Review Letters. 2023, 130: 071001. https://doi.org/10.1103/PhysRevLett.130.071001 |
Resumen: | The coupling between axions and photons modifies Maxwell’s equations, introducing a dynamo term in the magnetic induction equation. In neutron stars, for critical values of the axion decay constant and axion mass, the magnetic dynamo mechanism increases the total magnetic energy of the star. We show that this generates substantial internal heating due to enhanced dissipation of crustal electric currents. These mechanisms would lead magnetized neutron stars to increase their magnetic energy and thermal luminosity by several orders of magnitude, in contrast to observations of thermally emitting neutron stars. To prevent the activation of the dynamo, bounds on the allowed axion parameter space can be derived. |
Patrocinador/es: | F. A., P. D. L., and A. M. are supported by the Australian Research Council (ARC) Centre of Excellence for Gravitational Wave Discovery (OzGrav), through Project No. CE170100004. P. D. L. is supported through ARC Discovery Project No. DP220101610. J. A. P. acknowledges support by the Generalitat Valenciana (PROMETEO/2019/071) and AEI Grant No. PID2021-127495NB-I00. |
URI: | http://hdl.handle.net/10045/132202 |
ISSN: | 0031-9007 (Print) | 1079-7114 (Online) |
DOI: | 10.1103/PhysRevLett.130.071001 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 American Physical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1103/PhysRevLett.130.071001 |
Aparece en las colecciones: | INV - Astrofísica Relativista - Artículos de Revistas |
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Anzuini_etal_2023_PhysRevLett.pdf | 7,03 MB | Adobe PDF | Abrir Vista previa | |
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