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Aperture synthesis observations of protoplanetary disks with the Nobeyama Millimeter Array

S. Yokogawaa* Y. Kitamurab M. Momose0 and R. Kawabed "Graduate University for Advanced Studies, Japan institute of Space and Astronautical Science, Sagamihara, Kanagawa, 229- 8510, Japan institute of Astrophysics and Planetary Science, Ibaraki University, Mito, Ibaraki, 310-8512,Japan dNobeyama Radio Observatory, Nobeyama, Minamisaku, Nagano, 384-1305, Japan

We have made aperture synthesis observations of 2 mm continuum emission from the dust particles around pre-main-sequence stars with the Nobeyama Millimeter Array (NMA). We observed HL Tau, DO Tau, and GM Aur in the Taurus-Auriga dark clouds. By using the sparsest configuration of the NMA, we achieved a 1" resolution which corresponds to 140 AU at the region. As a result, we have resolved disklike structures toward all the objects. The flux densities and beam deconvolved sizes of the disks are 150 mJy and 1.12"x0.82" for HL Tau, 37 mJy and 0.79" xO.38" for DO Tau, and 31 mJy and 1.39" xO.76" for GM Aur. Using the disk sizes and the inclination angles which derived from our images and past studied SEDs, we determined the physical parameters of the disks.

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