@Article{OliveiraRCJSARP:2017:ExSpMa,
author = "Oliveira, Alexandre S. and Rodrigues, Cl{\'a}udia Vilega and
Cieslinski, Deonisio and Jablonski, Francisco Jos{\'e} and Silva,
K. M. G. and Almeida, L. A. and Rodrigues-Ardila, A. and Palhares,
M. S.",
affiliation = "{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)} and {Gemini Observatory} and {Universidade de
S{\~a}o Paulo (USP)} and {Laborat{\'o}rio Nacional de
Astrof{\'{\i}}sica (LNA)} and {Universidade do Vale do
Para{\'{\i}}ba (UNIVAP)}",
title = "Exploratory spectroscopy of magnetic cataclysmic variables
candidates and other variable objects",
journal = "Astronomical Journal",
year = "2017",
volume = "153",
number = "4",
month = "Apr.",
keywords = "binaries: close, novae, cataclysmic variables, stars: dwarf novae,
stars: variables: general, techniques: spectroscopic.",
abstract = "The increasing number of synoptic surveys made by small robotic
telescopes, such as the photometric Catalina Real-Time Transient
Survey (CRTS), provides a unique opportunity to discover variable
sources and improves the statistical samples of such classes of
objects. Our goal is the discovery of magnetic Cataclysmic
Variables (mCVs). These are rare objects that probe interesting
accretion scenarios controlled by the white-dwarf magnetic field.
In particular, improved statistics of mCVs would help to address
open questions on their formation and evolution. We performed an
optical spectroscopy survey to search for signatures of magnetic
accretion in 45 variable objects selected mostly from the CRTS. In
this sample, we found 32 CVs, 22 being mCV candidates, 13 of which
were previously unreported as such. If the proposed
classifications are confirmed, it would represent an increase of
4% in the number of known polars and 12% in the number of known
IPs. A fraction of our initial sample was classified as
extragalactic sources or other types of variable stars by the
inspection of the identification spectra. Despite the inherent
complexity in identifying a source as an mCV, variability-based
selection, followed by spectroscopic snapshot observations, has
proved to be an efficient strategy for their discoveries, being a
relatively inexpensive approach in terms of telescope time.",
doi = "10.3847/1538-3881/aa610d",
url = "http://dx.doi.org/10.3847/1538-3881/aa610d",
issn = "0004-6256",
language = "en",
targetfile = "oliveira_exploratory.pdf",
urlaccessdate = "04 maio 2024"
}