A survey for low-mass spectroscopic binary stars in the young clusters around σ Orionis and λ Orionis

@article{Maxted2008ASF,
  title={A survey for low-mass spectroscopic binary stars in the young clusters around $\sigma$ Orionis and $\lambda$ Orionis},
  author={P. Maxted and R. Jeffries and J. Oliveira and T. Naylor and R. Keele and Exeter},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2008},
  volume={385},
  pages={2210-2224}
}
We have obtained multi-epoch, high-resolution spectroscopy of 218 candidate low-mass stars and brown dwarfs (BDs) in the young clusters around a Ori and \ Ori. We find that 196 targets are cluster members based on their radial velocity, the equivalent width of their Na Ι 8200 lines and the spectral type from their TiO band strength. We have identified 11 new binary stars among the cluster members based on their variable radial velocity and an additional binary from the variation in its… Expand
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