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[93.04] A Near-Infrared Multiplicity Survey of Class I/Flat-Spectrum Systems in Six Nearby Molecular Clouds

K.E. Haisch Jr. (University of Michigan), T.P. Greene (NASA Ames Research Center), S.W. Stahler (University of California, Berkeley)

For the past two years, we have been conducting a near-to-mid-infrared multiplicity survey of Class I and flat-spectrum young stellar objects (YSOs) in six nearby (d \la 300 pc) dark clouds. The aim of our survey is to study the binary fractions and separations of Class I/flat-spectrum YSOs and diagnose the luminosities and evolutionary states of their components. Recent sub-arcsecond surveys of young stars have almost exclusively focused on pre-main-sequence T Tauri stars and have virtually ignored younger, Class I and flat-spectrum systems. Thus, we know very little about the multiplicity of self-embedded young stars. In this contribution, we present the results of our near-infrared survey of our six sample dark clouds.

K.E.H. acknowledges support from a National Research Council Associateship Award.

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.