Detection of the White Dwarf Spin of the Long-orbital Period Magnetic Cataclysmic Variable V1082 Sgr

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dc.contributor.authorLima, Isabel de Jesus
dc.contributor.authorTovmassian, Gagik
dc.contributor.authorRodrigues, Claudia Vilega
dc.contributor.authorOliveira, Alexandre Soares de
dc.contributor.authorLuna, Gerardo Juan Manuel
dc.contributor.authorBuckley, David A. H.
dc.contributor.authorSilva, Karleyne Medeiros Gomes da
dc.contributor.authorFigueiredo, Ana Carolina Mattiuci
dc.contributor.authorSouza, Diego Carvalho de
dc.contributor.authorSchlindwein, Wagner
dc.contributor.authorMarques, Fernando Falkenberg
dc.contributor.authorPalhares, Matheus Soares
dc.date.accessioned2025-08-14T19:26:54Z
dc.date.available2025-08-14T19:26:54Z
dc.date.issued22025
dc.description.abstractWe report on the discovery of circular polarization modulated with a period of 1.943 ± 0.002hr in the cataclysmic variable V1082 Sgr. These findings unambiguously reveal the rotation of a magnetic white dwarf and establish its intermediate polar nature. Along with its extraordinary long orbital period (Porb) of 20.8 hr, the spin period (Pspin) places this system in an extreme position of the Pspin versus Porb distribution. The circular polarization phase diagram has a single peak and an amplitude smaller than 1%. These data were used to model the postshock region of the accretion flow on the white dwarf surface using the CYCLOPS code. We obtained a magnetic field in the white dwarf pole of 11 MG and a magnetospheric radius consistent with the coupling region at around 2–3 white dwarf radii. The Pspin/Porb value and the estimated magnetic field momentum suggest that V1082 Sgr could be out of spin equilibrium or in a spin-up state, possibly in a stream accretion mode.
dc.description.physical9 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.uriCAPES (#88887.913793/2023-00; 88887.714650/2022-00 and #88881.846501/2023-01) CNPq (310930/2021-9; 150737/2024-6, 141350/2023-7; 318052/2021-0, 300343/ 2022-1, 300834/2023-3, 301366/2023-3, 300252/ 2024-2 and 301472/2024-6) FAPESP (2017/20309-7)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationUniversidade Estadual Paulista “Júlio de Mesquita Filho
dc.identifier.affiliationInstituto de Astronomía y Física del Espacio
dc.identifier.affiliationUniversidad Nacional de San Juan
dc.identifier.affiliationLaboratório Nacional de Astrofísica
dc.identifier.affiliationUniversidad Nacional Autonoma de Mexico
dc.identifier.affiliationOsservatorio Astronomico di Brera
dc.identifier.affiliationInstituto Nacional de Pesquisas Espaciais
dc.identifier.affiliationUniversidad Nacional de Hurlingham
dc.identifier.affiliationSouth African Astronomical Observatory
dc.identifier.affiliationUniversity of the Free State
dc.identifier.affiliationUniversity of Cape Town
dc.identifier.affiliationGemini Observatory
dc.identifier.bibliographicCitationLIMA, I. J. et al. Detection of the White Dwarf Spin of the Long-orbital Period Magnetic Cataclysmic Variable V1082 Sgr. The Astrophysical Journal, v. 984, n. 2, p. 1-9, 2025. Disponível em: 10.3847/1538-4357/adc380.
dc.identifier.doi10.3847/1538-4357/adc380
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/1019
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dc.rights.holderThe Astrophysical Journal
dc.subject.keywordClose binary stars
dc.subject.keywordCataclysmic variable stars
dc.subject.keywordStarlight polarization
dc.titleDetection of the White Dwarf Spin of the Long-orbital Period Magnetic Cataclysmic Variable V1082 Sgr
dc.typeArtigos de Periódicos

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