Inner Rim of A Molecular Disk Spatially Resolved in Infrared CO Emission Lines

(2) Subaru Telescope; (2) Thueringer Landessternwarte; (4) NAOJ; B. Stecklum (3); C. P. Dullemond (1); H. Linz (1); H. Suto (4) ((1) MPIA; M. Goto (1); Mitaka); Tautenburg

arxiv: astro-ph/0606362 · v1 · pith:HUEA7VEZnew · submitted 2006-06-14 · 🌌 astro-ph

Inner Rim of A Molecular Disk Spatially Resolved in Infrared CO Emission Lines

M. Goto (1) , T. Usuda (2) , C. P. Dullemond (1) , Th. Henning (1) , H. Linz (1) , B. Stecklum (3) , H. Suto (4) ((1) MPIA , (2) Subaru Telescope

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(2) Thueringer Landessternwarte Tautenburg (4) NAOJ Mitaka)

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classification 🌌 astro-ph

keywords diskinnerradiusgravitationalinfraredresolvedspatiallystar

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We present high-resolution infrared spectroscopy of the Herbig Ae star HD 141569 A in the CO v=2-1 transition. With the angular resolution attained by the adaptive optics system, the gas disk around HD 141569 A is spatially resolved down to its inner-rim truncation. The size of the inner clearing is 11+-2 AU in radius, close to the gravitational radius of the star. The rough coincidence to the gravitational radius indicates that the viscous accretion working together with the photoevaporation by the stellar radiation has cleared the inner part of the disk.

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Inner Rim of A Molecular Disk Spatially Resolved in Infrared CO Emission Lines

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