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

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

2006-06-14

arxiv.org/abs/astro-ph/0606362v1

Astrophys.J.652:758-762,2006

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, Accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/506582

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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