High-resolution Spectroscopy of [Ne II] Emission from TW Hya
Astrophysics
2009-11-13 v1
Abstract
We present high-resolution echelle spectra of [Ne II] 12.81 micron 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\pm 4 km/s. 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.
Keywords
Cite
@article{arxiv.0706.3901,
title = {High-resolution Spectroscopy of [Ne II] Emission from TW Hya},
author = {Gregory J. Herczeg and Joan Najita and Lynne A. Hillenbrand and Ilaria Pascucci},
journal= {arXiv preprint arXiv:0706.3901},
year = {2009}
}