M. Simon et al. 1999 The Astronomical Journal 117 1594 doi:10.1086/300757
Lunar Occultations of Young Stars in Southern Taurus
FREE ISSUEM. Simon1,7,8, Tracy L. Beck1,7, T. P. Greene2,3, R. R. Howell4, S. Lumsden5 and L. Prato6,7
Show affiliationsWe have obtained lunar occultation observations of NTT 042916+1751, V826 Tau, L1551-55, HN Tau, DQ Tau, and DR Tau by high-speed single-channel photometry in the IR K band. We detect no companions in the angular separation range 0
020–10'' to a magnitude limit typically 2 mag fainter than the target. Additional occultation observations of GG Tau and HL Tau using IR cameras at K reveal no new stars in the GG Tau A binary within ~2 mag of the primary in the range ~008–10'' and no companion of HL Tau within 1.5 mag and ~009–10''. The binary fraction of the 56 systems in the Taurus star formation region that have been surveyed by lunar occultation and imaging is 61%. Of the 56 systems, 53 have been surveyed for companions in the angular separation range 0020–10''. Their binary frequency is at least 1.4 ± 0.3 times that measured by Duquennoy & Mayor for the nearby F and G stars. These values for the binary frequency are lower bounds because they contain no corrections for incompleteness.
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Issue 3 (1999 March)
Received 1998 July 7, accepted for publication 1998 November 11
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Lunar Occultations of Young Stars in Southern Taurus
M. Simon et al. 1999 The Astronomical Journal 117 1594
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