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		<doi>10.3847/1538-3881/abeb16</doi>
		<issn>0004-6256</issn>
		<label>lattes: 9527193250756102 2 LimaRLSJOSBPSBA:2021:SeMaAc</label>
		<citationkey>LimaRLSJOSBPSBA:2021:SeMaAc</citationkey>
		<title>Search for Magnetic Accretion in SW Sextantis Systems</title>
		<year>2021</year>
		<secondarytype>PRE PI</secondarytype>
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		<author>Lima, Isabel de Jesus,</author>
		<author>Rodrigues, Cláudia Vilega,</author>
		<author>Lopes, Carlos Eduardo Ferreira,</author>
		<author>Szkody, P.,</author>
		<author>Jablonski, Francisco José,</author>
		<author>Oliveira, A. S.,</author>
		<author>Silva, K. M. G.,</author>
		<author>Belloni, Diogo Teixeira,</author>
		<author>Palhares, M. S.,</author>
		<author>Shugarov, S.,</author>
		<author>Baptista, R.,</author>
		<author>Almeida, L. A.,</author>
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		<group>AST-CEA-DIPGR-INPE-MCTI-GOV-BR</group>
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		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>University of Washington</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universidade do Vale do Paraíba (UNIVAP)</affiliation>
		<affiliation>Gemini Observatory Southern Operations Center</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universidade do Vale do Paraíba (UNIVAP)</affiliation>
		<affiliation>Astronomical Institute of the Slovak Academy of Sciences</affiliation>
		<affiliation>Universidade Federal de Santa Catarina (UFSC)</affiliation>
		<affiliation>Universidade Federal do Rio Grande do Norte (UFRN)</affiliation>
		<electronicmailaddress>isabel.lima@inpe.br</electronicmailaddress>
		<electronicmailaddress>claudia.vilega@inpe.br</electronicmailaddress>
		<electronicmailaddress>carlos.lopes@inpe.br</electronicmailaddress>
		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress>francisco.jablonski@inpe.br</electronicmailaddress>
		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress>diogo.belloni@inpe.br</electronicmailaddress>
		<journal>Astronomical Journal</journal>
		<volume>161</volume>
		<number>5</number>
		<pages>225</pages>
		<secondarymark>A1_GEOCIÊNCIAS A2_INTERDISCIPLINAR A2_ASTRONOMIA_/_FÍSICA</secondarymark>
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		<contenttype>External Contribution</contenttype>
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		<keywords>anãs brancas, Polarimetria, Variaveis Cataclismicas.</keywords>
		<abstract>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.</abstract>
		<area>CEA</area>
		<language>en</language>
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