Journal
ASTROPHYSICAL JOURNAL
Volume 652, Issue 1, Pages 758-762Publisher
IOP PUBLISHING LTD
DOI: 10.1086/506582
Keywords
circumstellar matter; infrared : stars; planetary systems : formation; planetary systems : protoplanetary disks; stars : formation; stars : individual (HD 141569A)
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We present high-resolution infrared spectroscopy of the Herbig Ae star HD 141569A in the CO nu = 2-1 transition. With the angular resolution attained by the adaptive optics system, the gas disk around HD 141569A 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 with the gravitational radius indicates that the viscous accretion working together with photoevaporation by stellar radiation has cleared the inner part of the disk.
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