CO study of the GM Aurigae Keplerian disk
نویسندگان
چکیده
We report new high resolution (0.6 − 1.7′′) images of GM Aur in the 12CO J = 2→1 line and the 1.3 and 2.7 mm continuum. The dust disk, located at the center of the CO disk, is resolved by the 0.6′′ beam of the interferometer. We derive a minimum radius of ∼ 200 AU, and a total mass (dust+gas) of about ∼ 0.025M . Our CO observations also resolve the Keplerian rotation of the gas disk. Since the CO emission is optically thick, the CO data does not allow a disk mass measurement but we can estimate the dynamical mass of the system, i.e. the stellar mass, M∗ = 0.84 ± 0.05 × (D/140 pc)M although a solution with a more inclined disk and lower stellar mass (∼ 0.6M ) is also possible.
منابع مشابه
ar X iv : a st ro - p h / 05 02 13 1 v 1 7 Fe b 20 05 ApJL , in prep . AB Aurigae Resolved : Evidence for Spiral Structure
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