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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Exploratory Spectroscopy of Magnetic Cataclysmic Variables Candidates and Other Variable Objects

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Oliveira, A. S. ; Rodrigues, C. V. ; Cieslinski, D. ; Jablonski, F. J. ; Silva, K. M. G. ; Almeida, L. A. ; Rodriguez-Ardila, A. ; Palhares, M. S.
Total Authors: 8
Document type: Journal article
Source: ASTRONOMICAL JOURNAL; v. 153, n. 4 APR 2017.
Web of Science Citations: 4

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. (AU)

FAPESP's process: 12/09716-6 - Accurate distances tò young clusters through massive eclipsing binaries
Grantee:Leonardo Andrade de Almeida
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/18245-0 - Full spectroscopic orbital solutions for more than 100 massive binaries in the high-mass starburst region 30 Doradus
Grantee:Leonardo Andrade de Almeida
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/26258-4 - Superdense matter in the universe
Grantee:Manuel Máximo Bastos Malheiro de Oliveira
Support type: Research Projects - Thematic Grants