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dc.contributor.author
Carrasco, Federico León
dc.contributor.author
Pelle, Joaquín
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Reula, Oscar Alejandro
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Viganò, D.
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Palenzuela, C.
dc.date.available
2024-02-08T15:06:47Z
dc.date.issued
2023-04
dc.identifier.citation
Carrasco, Federico León; Pelle, Joaquín; Reula, Oscar Alejandro; Viganò, D.; Palenzuela, C.; Relativistic force-free models of the thermal X-ray emission in millisecond pulsars observed by NICER; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 520; 2; 4-2023; 3151-3163
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/226473
dc.description.abstract
Several important properties of rotation-powered millisecond pulsars (MSPs), such as their mass-radius ratio, equation of state and magnetic field topology, can be inferred from precise observations and modelling of their X-ray light curves. In the present study, we model the thermal X-ray signals originated in MSPs, all the way from numerically solving the surrounding magnetospheres up to the ray tracing of the emitted photons and the final computation of their light curves and spectra. The magnetosphere is solved by performing general relativistic force-free simulations of a rotating neutron star (NS) endowed with a simple centred dipolar magnetic field, for many different stellar compactness and pulsar misalignments. From these solutions, we derive an emissivity map over the surface of the star, based on the electric currents in the magnetosphere. In particular, the emission regions (ERs) are determined in this model by spacelike four-currents that reach the NS. We show that this assumption, together with the inclusion of the gravitational curvature on the force-free simulations, lead to non-standard ERs facing the closed-zone of the pulsar, in addition to other ERs within the polar caps. The combined X-ray signals from these two kinds of ERs (both antipodal) allow to approximate the non-trivial interpulses found in several MSPs light curves. Our modelled X-ray signals are compared against very accurate NICER observations of four target pulsars: PSR J043-4715, PSR J1231-1411, PSR J2124-3358, and PSR J0030 + 0451; achieving very good simultaneous fits for their light curves and spectral distributions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
METHODS: NUMERICAL
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PULSARS: GENERAL
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RADIATION MECHANISMS: THERMAL
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RADIATIVE TRANSFER
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X-RAYS: STARS
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Relativistic force-free models of the thermal X-ray emission in millisecond pulsars observed by NICER
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-02-07T14:50:07Z
dc.journal.volume
520
dc.journal.number
2
dc.journal.pagination
3151-3163
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Carrasco, Federico León. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.description.fil
Fil: Pelle, Joaquín. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.description.fil
Fil: Reula, Oscar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
dc.description.fil
Fil: Viganò, D.. Instituto de Estudios Espaciales de Cataluña; España. Universidad de Las Islas Baleares. Departamento de Fisica; España. Consejo Superior de Investigaciones Cientificas. Instituto Nacional de Tecnica Aeroespacial. Departamento de Cargas Utiles y Ciencias del Espacio; España
dc.description.fil
Fil: Palenzuela, C.. Universidad de Las Islas Baleares. Departamento de Fisica; España. Instituto de Estudios Espaciales de Cataluña; España
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/520/2/3151/7017841
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stad333
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info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2209.11674
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