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M. W. McElwain, J. E. Larkin, M. Barczys, J. L. Weiss, S. A. Wright (UCLA), A. C. Krabbe, C. Iserlohe (Univ. zu Köln), A. Quirrenbach (Sterrewacht Leiden)
We present OSIRIS spectral imaging of small separation (< 2") high contrast binary systems resolved with the Keck II adaptive optics (AO) system. OSIRIS is an infrared integral field spectrograph, with a spectral resolution of 3800 and diffraction limited sampling. OSIRIS is ideal for observing binary systems, because it can simultaneously measure the astrometric, photometric, and spectroscopic properties of a system. We present observations of T Tau Sab and HD 130948bc which have similiar magnitude components (q ~ 1) and are closely separated binaries (~ 0.1"). In addition, the integral field nature of OSIRIS can be used in high contrast observations to identify and subsequently suppress the diffraction features that commonly mask faint point source detections. We employ speckle and spectral suppression techniques to search for non-stellar (brown dwarf and planetary) companions in the halos of nearby, young stars.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.