We present high-resolution, near-infrared spectro-astrometric (SA) data for the T Tauri star DR Tau using NIRSPEC at the Keck II telescope. Spectro-astrometry obtains sub-seeing spatial information from emission lines originating in a non-point source object, such as a circumstellar disk. We report the first detection of water SA signatures in a protoplanetary disk. Three water features near 3 μm were averaged together to produce the total signal analyzed. Using a disk model, we constrained the position angle of the disk (~140°), the inclination of the disk (~13°), and the emitting region of the emission lines (~0.056-0.38 AU).
The Astrophysical Journal Letters
Brown, Logan; Troutman, Matthew; and Gibb, Erika, "Spectro-Astrometry of Water in Dr Tauri" (2013). Physics Faculty Works. 31.
Available at: https://irl.umsl.edu/physics-faculty/31