We present high-resolution echelle spectra of [Nen Π] 12.81 μm. 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 Π] emission flux from the CTTSs DP Tau and BP Tau.
- Infrared: stars
- Planetary systems: protoplanetary disks
- Stars: pre-main-sequence
ASJC Scopus subject areas
- Space and Planetary Science