@Article{BelloniScPaGäZoRo:2020:EvReMa,
author = "Belloni, Diogo Teixeira and Schreiber, Matthias R. and Pala, Anna
Francesca and G{\"a}nsicke, Boris T. and Zorotovic, M{\'o}nica
and Rodrigues, Cl{\'a}udia Vilega",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidad de Valpara{\'{\i}}so} and {European Southern
Observatory} and {University of Warwick} and {Universidad de
Valpara{\'{\i}}so} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Evidence for reduced magnetic braking in polars from binary
population models",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2020",
volume = "491",
number = "4",
pages = "5717--5731",
month = "Feb.",
keywords = "methods: numerical, stars: evolution, stars: magnetic field,
novae, cataclysmic variables, white dwarfs.",
abstract = "We present the first population synthesis of synchronous magnetic
cataclysmic variables, called polars, taking into account the
effect of the white dwarf (WD) magnetic field on angular momentum
loss. We implemented the reduced magnetic braking (MB) model
proposed by Li, Wu \& Wickramasinghe into the Binary Stellar
Evolution (BSE) code recently calibrated for cataclysmic variable
(CV) evolution. We then compared separately our predictions for
polars and non-magnetic CVs with a large and homogeneous sample of
observed CVs from the Sloan Digital Sky Survey. We found that the
predicted orbital period distributions and space densities agree
with the observations if period bouncers are excluded. For polars,
we also find agreement between predicted and observed mass
transfer rates, while the mass transfer rates of non-magnetic CVs
with periods greater than or similar to 3 h drastically disagree
with those derived from observations. Our results provide strong
evidence that the reduced MB model for the evolution of highly
magnetized accreting WDs can explain the observed properties of
polars. The remaining main issues in our understanding of CV
evolution are the origin of the large number of highly magnetic
WDs, the large scatter of the observed mass transfer rates for
non-magnetic systems with periods greater than or similar to 3 h,
and the absence of period bouncers in observed samples.",
doi = "10.1093/mnras/stz3413",
url = "http://dx.doi.org/10.1093/mnras/stz3413",
issn = "0035-8711 and 1365-2966",
language = "en",
targetfile = "belloni_evidence.pdf",
urlaccessdate = "27 abr. 2024"
}