Journal
ASTROPHYSICAL JOURNAL
Volume 670, Issue 1, Pages 509-515Publisher
IOP PUBLISHING LTD
DOI: 10.1086/521545
Keywords
infrared : stars; planetary systems : protoplanetary disks; stars : pre-main-sequence
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We present high-resolution echelle spectra of [Ne II] 12.81 mu m emission from the classical T Tauri star (CTTS) TW Hya, obtained with MICHELLE on Gemini North. The line is centered at the stellar radial velocity and has an intrinsic FWHM of 21 +/- 4 km s(-1). The line width is broader than other narrow emission lines typically associated with the disk around TW Hya. If formed in a disk, the line broadening could result from turbulence in a warm disk atmosphere, Keplerian rotation at an average distance of 0.1 AU from the star, or a photoevaporative flow from the optically thin region of the disk. We place upper limits on the [Ne II] emission flux from the CTTSs DP Tau and BP Tau.
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