%0 Journal Article
%4 sid.inpe.br/plutao/2021/06.16.04.09
%2 sid.inpe.br/plutao/2021/06.16.04.09.54
%@doi 10.3847/1538-3881/abeb16
%@issn 0004-6256
%F lattes: 9527193250756102 2 LimaRLSJOSBPSBA:2021:SeMaAc
%T Search for Magnetic Accretion in SW Sextantis Systems
%D 2021
%A Lima, Isabel de Jesus,
%A Rodrigues, Cláudia Vilega,
%A Lopes, Carlos Eduardo Ferreira,
%A Szkody, P.,
%A Jablonski, Francisco José,
%A Oliveira, A. S.,
%A Silva, K. M. G.,
%A Belloni, Diogo Teixeira,
%A Palhares, M. S.,
%A Shugarov, S.,
%A Baptista, R.,
%A Almeida, L. A.,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation University of Washington
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Universidade do Vale do Paraíba (UNIVAP)
%@affiliation Gemini Observatory Southern Operations Center
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Universidade do Vale do Paraíba (UNIVAP)
%@affiliation Astronomical Institute of the Slovak Academy of Sciences
%@affiliation Universidade Federal de Santa Catarina (UFSC)
%@affiliation Universidade Federal do Rio Grande do Norte (UFRN)
%@electronicmailaddress isabel.lima@inpe.br
%@electronicmailaddress claudia.vilega@inpe.br
%@electronicmailaddress carlos.lopes@inpe.br
%@electronicmailaddress
%@electronicmailaddress francisco.jablonski@inpe.br
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress diogo.belloni@inpe.br
%B Astronomical Journal
%V 161
%N 5
%P 225
%K anãs brancas, Polarimetria, Variaveis Cataclismicas.
%X SW 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.
%@language en
%3 lima_search.pdf