Smoking Gun of the Dynamical Processing of the Solar-type Field Binary Stars

  title={Smoking Gun of the Dynamical Processing of the Solar-type Field Binary Stars},
  author={C. Liu},
  journal={Monthly Notices of the Royal Astronomical Society},
  • C. Liu
  • Published 2019
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We investigate the binarity properties in field stars using more than 50\,000 main-sequence stars with stellar mass from 0.4 to 0.85\,$M_\odot$ observed by LAMOST and {\emph Gaia} in the solar neighborhood. By adopting a power-law shape of the mass-ratio distribution with power index of $\gamma$, we conduct a hierarchical Bayesian model to derive the binary fraction ($f_{b}$) and $\gamma$ for stellar populations with different metallicities and primary masses ($m_1$). We find that $f_b$ is… CONTINUE READING

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