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Astrophysics

arXiv:0706.3901 (astro-ph)
[Submitted on 26 Jun 2007]

Title:High-resolution Spectroscopy of [Ne II] Emission from TW Hya

Authors:Gregory J. Herczeg, Joan Najita, Lynne A. Hillenbrand, Ilaria Pascucci
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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.
Comments: Accepted by ApJ. 18 pages, including 2 figures and 2 tables
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.3901 [astro-ph]
  (or arXiv:0706.3901v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.3901
Related DOI: https://doi.org/10.1086/521545

Submission history

From: Gregory J. Herczeg [view email]
[v1] Tue, 26 Jun 2007 20:12:49 UTC (47 KB)
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