Search for Magnetic Accretion in SW Sextantis Systems

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dc.contributor.authorLima, Isabel de Jesus
dc.contributor.authorRodrigues, Claudia Vilega
dc.contributor.authorLopes, Carlos Eduardo Ferreira
dc.contributor.authorSzkody, Paula
dc.contributor.authorJablonski, Francisco José
dc.contributor.authorOliveira, Alexandre Soares de
dc.contributor.authorSilva, Karleyne M. G.
dc.contributor.authorBelloni, Diogo
dc.contributor.authorPalhares, Matheus Soares
dc.contributor.authorShugarov, Sergey
dc.contributor.authorBaptista, Raymundo
dc.contributor.authorAlmeida, Leonardo Andrade de
dc.date.accessioned2025-04-08T17:22:32Z
dc.date.available2025-04-08T17:22:32Z
dc.date.issued22021
dc.description.abstractSW Sextantis systems are nova-like cataclysmic variables that have unusual spectroscopic properties, which are thought to be caused by an accretion geometry having part of the mass flux trajectory out of the orbital plane. Accretion onto a magnetic white dwarf is one of the proposed scenarios for these systems. To verify this possibility, we analyzed photometric and polarimetric time-series data for a sample of six SW Sex stars. We report possible modulated circular polarization in BO Cet, SW Sex, and UU Aqr with periods of 11.1, 41.2, and 25.7 minutes, respectively, and less significant periodicities for V380 Oph at 22 minutes and V442 Oph at 19.4 minutes. We confirm previous results that LS Peg shows variable circular polarization. However, we determine a period of 18.8 minutes, which is different from the earlier reported value. We interpret these periods as the spin periods of the white dwarfs. Our polarimetric results indicate that 15% of the SW Sex systems have direct evidence of magnetic accretion. We also discuss SW Sex objects within the perspective of being magnetic systems, considering the latest findings about the demography, formation, and evolution of cataclysmic variables.
dc.description.physical21 p.
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriFAPESP (#2018/05420-1, #2015/24383-7, and #2013/26258-4) CNPq (#303444/2018-5)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationUniversity of Washington
dc.identifier.affiliationSlovak Academy of Sciences
dc.identifier.affiliationLomonosov Moscow State University
dc.identifier.affiliationUniversidade Federal de Santa Catarina
dc.identifier.affiliationUniversidade Federal do Rio Grande do Norte
dc.identifier.bibliographicCitationLIMA, Isabel de Jesus et al. Search for Magnetic Accretion in SW Sextantis Systems. The Astronomical Journal, v. 161, n. 5, p. 1-21, 2021. Disponível em:
dc.identifier.doi10.3847/1538-3881/abeb16
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/825
dc.language.isoen_US
dc.publisherIOP science
dc.rights.holderThe Astronomical Journal
dc.subject.keywordCataclysmic variable stars
dc.subject.keywordMagnetic variable stars
dc.subject.keywordPolarimetry
dc.subject.keywordPhotometry
dc.titleSearch for Magnetic Accretion in SW Sextantis Systems
dc.typeArtigos de Periódicos

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