Lunar Occultations of Young Stars in Southern Taurus

Details Lunar Occultations of Young Stars in Southern Taurus Lunar Occultations of Young Stars in Southern Taurus

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aj....117.1594s&link_type=abstract

The Astronomical Journal, Volume 117, Issue 3, pp. 1594-1597.

Astronomy and Astrophysics

Astronomy

10

Stars: Binaries: Visual, Stars: Pre-Main-Sequence

Scientific paper

We 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 ~0.08"-10" and no companion of HL Tau within 1.5 mag and ~0.09"-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 0.020"-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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