@Article{SilvaRoOlAlCiCoJa:2015:NeEcPo,
author = "Silva, Karleyne M. G. and Rodrigues, Cl{\'a}udia Vilega and
Oliveira, A. S. and Almeida, L. A. and Cieslinski,
Deon{\'{\i}}sio and Costa, Joaquim Eduardo Rezende and
Jablonski, Francisco Jos{\'e}",
affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {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)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "MLS110213:022733+130617: a new eclipsing polar above the period
gap",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2015",
volume = "451",
pages = "4183--4192",
keywords = "Binaries: eclipsing, Magnetic fields, Novae, cataclysmic
variables, Polarization, Radiative transfer, Stars: individual:
MLS110213:022733+130617.",
abstract = "This study confirms MLS110213:022733+130617 as a new eclipsing
polar. We performed optical spectroscopic, polarimetric and
photometric follow-up of this variable source identified by the
Catalina Real Time Transient Survey. Using the mid-eclipse times,
we estimated an orbital period of 3.787 h, which is above the
orbital period gap of the cataclysmic variables (CVs). There are
nine other known polars with longer orbital periods, and only two
of them are eclipsing. We identified high- and low-brightness
states and high polarization modulated with the orbital period.
The spectra are typical of polars, with strong high ionization
emission lines and inverted Balmer decrement. The He II 4686 Å
line is as strong as H \β. We modelled the photometric and
polarimetric bright-state light curves using the CYCLOPS code. Our
modelling suggests an extended emitting region on the white dwarf
(WD) surface, with a mean temperature of 9 keV and B in the range
18-33, although the possibility that it could be a two-pole
accretor cannot yet be ruled out. TheWDmass estimated from the
shock temperature is 0.67 M\⊙. The derived parameters are
consistent with the eclipse profile. The distance was estimated as
406 ± 54 pc using the period-luminosity-colours method. MLS110213
populates a rare sub-group of polars, near the upper limit of the
period distribution, important to understand the evolution of
mCVs.",
doi = "10.1093/mnras/stv1105",
url = "http://dx.doi.org/10.1093/mnras/stv1105",
issn = "0035-8711 and 1365-2966",
language = "en",
urlaccessdate = "27 abr. 2024"
}