@InProceedings{MartinsOlivRodrBell:2021:OpObCy,
               author = "Martins, M. and Oliveira, A. S. and Rodrigues, Cl{\'a}udia Vilega 
                         and Belloni, Diogo Teixeira",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Optical observations and cyclops post-shock region modelling of 
                         the polar 1RXS J174320.1-042953",
                 year = "2021",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 8. (SBGEA)",
             abstract = "Cataclysmic variables (CVs) are stellar binary systems composed of 
                         a white dwarf star (WD) that accretes matter from a late-type main 
                         sequence companion via an accretion disc. The magnetic Cataclysmic 
                         Variables (mCVs) harbours WDs with strong magnetic fields and are 
                         classified either as polars, whose B > 107G prevents the formation 
                         of the disc, or as intermediate polars (IPs) with B \∼ 
                         107G, where an internally truncated disc may exist. In this work, 
                         we present the analysis of extensive, time-resolved spectroscopic, 
                         photometric and polarimetric data of the polar 1RXSJ174320.1- 
                         042953 (=RXJ1743) obtained at the SOAR and OPD telescopes. This 
                         object was selected as a candidate in a project to identify new 
                         mCVs from the Catalina Real-Time Transient Survey - CRTS - and 
                         from previously known X-ray sources. We also present a modelling 
                         of the photometric and polarimetric data with the CYCLOPS code, in 
                         order to investigate the geometry and physics of the accretion 
                         structure close to the WD. Our photometric data yield a 
                         non-eclipsing lightcurve and an orbital period of 0.08659 days 
                         consistent, within the uncertainties, with the period found in the 
                         literature. No stable periodicity related the spin of an 
                         unsynchronized WD primary is present in the data, which would 
                         otherwise indicate an IP nature for this system. The polarimetric 
                         data reveal strong and modulated circular polarization at the 45% 
                         level, besides less intense linear polarization. The optical 
                         spectrum is typical of polars, with no lines from the secondary 
                         component. The He II 4686 \˚A and Balmer emission-line 
                         radial velocities are modulated with the orbital period. In 
                         conclusion, our observational follow-up establishes RXJ1743 as a 
                         polar, with an orbital period close to the lower edge of the CVs 
                         period gap.",
  conference-location = "Online",
      conference-year = "22-26 mar.",
             language = "en",
        urlaccessdate = "20 maio 2024"
}