Variability And Disk Geometry In The Classical T Tauri Star Tw Hya Using Mid-infrared Speckle Interferometry
Abstract
We present Gemini T-ReCS mid-infrared speckle interferometry observations at multiple epochs and wavelengths of the classical T Tauri star TW Hya. Our dataset consists of 8.8 and 11.7 µm observations from 2007 and 11.7 and 18.3 µm observations from 2009. We resolve the disk emission around TW Hya at all wavelengths, and find significant variability in the distribution of 11.7 µm emission across the two epochs. We analyze our data in conjunction with previous spatially resolved mid-IR measurements from VLTI and fluxes from the literature in the
3-25 µm range. We construct simple disk models to explain the fluxes and spatial distributions of emission observed for TW Hya, and test the validity of previous models. This work was supported by the National Science Foundation through a Graduate Research Fellowship to Timothy J. Arnold.- Publication:
-
American Astronomical Society Meeting Abstracts #217
- Pub Date:
- January 2011
- Bibcode:
- 2011AAS...21734025A