A lithium depletion boundary age of 21 Myr for the Beta Pictoris moving group

  title={A lithium depletion boundary age of 21 Myr for the Beta Pictoris moving group},
  author={A S Binks and R D Jeffries},
  journal={Monthly Notices of the Royal Astronomical Society},
Optical spectroscopy is used to confirm membership for 8 low- mass candidates in the young Beta Pic moving group (BPMG) via their radial velocities, chromospheric activity and kinematic parallaxes. We searched for the presence of the Li I 6708 ˚ A resonance feature and combined the results with literature measurements of other BPMG members to find the agedependent lithium depletion boundary (LDB) ‐ the luminosity at which Li remains unburned in a coeval group. The LDB age of the BPMG is 21 ± 4… Expand

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