Double-lined spectroscopic binaries in M11

Abstract

We have developed a new method for spectral analysis of binaries. Our method successfully identifies SB2 candidates from high-resolution Gaia-ESO spectra. Compared to the commonly used cross-correlation function analysis, it works for binaries with rapidly rotating components. We test our method on synthetic and observational spectra of BAFG-stars in the open cluster M 11. We confirm five previously detected SB2 candidates and find 19 new ones. For three SB2 candidates we find circular orbits and obtain dynamical mass ratios.

arXiv commentaccepted in MNRAS 15.11.21

References in corpus (16)

• Gaia Data Release 2. Summary of the contents and survey properties
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• SB9: The Ninth Catalogue of Spectroscopic Binary Orbits
• PARSEC evolutionary tracks of massive stars up to $350M_{\odot }$ at metallicities 0.0001$\le Z\le$0.04
• Updated parameters of 1743 open clusters based on Gaia DR2
• Gaia Radial Velocity Spectrometer
• Discovery and Characterization of 3000+ Main-Sequence Binaries from APOGEE Spectra
• Grid Search in Stellar Parameters: a software for spectrum analysis of single stars and binary systems
• The Gaia-ESO Survey: Stellar content and elemental abundances in the massive cluster NGC 6705
• Discovery of extended main sequence turn offs in Galactic open clusters
• The Gaia-ESO Survey: double, triple and quadruple-line spectroscopic binary candidates
• NLTE Chemical abundances in Galactic open and globular clusters
• The Gaia-ESO Survey: calibration strategy
• Double-lined Spectroscopic Binary Stars in the Radial Velocity Experiment Survey
• The Gaia-ESO Survey: detection and characterization of single line spectroscopic binaries