Double-lined Spectroscopic Binary Stars in the Radial Velocity Experiment Survey - Astrophysics > Solar and Stellar AstrophysicsReportar como inadecuado




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Abstract: We devise a new method for the detection of double-lined binary stars in asample of the Radial Velocity Experiment RAVE survey spectra. The method isboth tested against extensive simulations based on synthetic spectra, andcompared to direct visual inspection of all RAVE spectra. It is based on theproperties and shape of the cross-correlation function, and is able to recover~80% of all binaries with an orbital period of order 1 day. Systems withperiods up to 1 year are still within the detection reach. We have applied themethod to 25,850 spectra of the RAVE second data release and found 123double-lined binary candidates, only eight of which are already marked asbinaries in the SIMBAD database. Among the candidates, there are seven thatshow spectral features consistent with the RS CVn type solar type with activechromosphere and seven that might be of W UMa type over-contact binaries.One star, HD 101167, seems to be a triple system composed of three nearlyidentical G-type dwarfs. The tested classification method could also beapplicable to the data of the upcoming Gaia mission.



Autor: G. Matijevic, T. Zwitter, U. Munari, O. Bienayme, J. Binney, J. Bland-Hawthorn, C. Boeche, R. Campbell, K. C. Freeman, B. Gibson,

Fuente: https://arxiv.org/







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