High-resolution spectroscopy of [Ne Π] emission from TW hydrae

Gregory J. Herczeg, Joan R. Najita, Lynne A. Hillenbrand, Ilaria Pascucci

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)509-515
Number of pages7
JournalAstrophysical Journal
Issue number1
StatePublished - Nov 20 2007


  • Infrared: stars
  • Planetary systems: protoplanetary disks
  • Stars: pre-main-sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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