HD 199143 and HD 358623: Two recently identified members of the β Pictoris moving group

¹ Department of Physics and Astronomy, UC Los Angeles, USA
² Institute for Geophysics and Planetary Physics, UC Los Angeles, USA
³ Institute for Geophysics and Planetary Physics, Lawrence Livermore National Labs, USA
⁴ Department of Terrestrial Magnetism, Carnegie Institution of Washington, USA
⁵ Division of Physics, Mathematics, and Astronomy, California Institute of Technology, USA

Corresponding author: D. Kaisler, Kaisler@astro.ucla.edu

Received: 18 March 2003
Accepted: 9 October 2003

Abstract

HD 199143 and HD 358623 (BD-17°6128) are two sets of binary stars which are physically associated and 48 pc from Earth. We present heliocentric radial velocities and high lithium abundances which establish these stars as members of the ~12 Myr-old β Pictoris Moving Group. We also present mid-IR photometric measurements which show no firm evidence for warm dust around all four stars.