The TW Hya Rosetta Stone Project. II. Spatially Resolved Emission of Formaldehyde Hints at Low-temperature Gas-phase Formation

Spatially Resolving the Inner Disk of TW Hya

We present Keck Interferometer observations of TW Hya that spatially resolve its emission at 2 µm wavelength. Analyzing these data together with existing K-band veiling and near-infrared photometric measurements, we conclude that the inner disk consists of optically thin, sub-micron-sized dust extending from ∼ 4 AU to within 0.06 AU of the central star. The inner disk edge may be magnetospheric...

Millimeter Observations of the Tw Hya System

We present millimeter wavelength aperture synthesis observations of TW Hya obtained with the Very Large Array and the BIMA array. Images at 7 mm resolve the dusty circumstellar disk surrounding the star, probing structure to size scales of 0: 00 1 (5 AU). We describe how the long wavelength spectrum and resolved millimeter images constrain the radial distribution of disk surface density.

Towards Planetesimals in the Disk around TW Hya : λ = 3 . 5 centimeter Dust Emission

We present Very Large Array observations at λ = 3.5 cm of the nearby young star TW Hya that show the emission is constant in time over weeks, months and years, and spatially resolved with peak brightness temperature ∼ 10 K at ∼ 0. ′′ 25 (15 AU) resolution. These features are naturally explained if the emission mechanism at this wavelength is thermal emission from dust particles in the disk surr...

HST Observations of Dusty Disks in the TW Hya Association

6 – 5 observations of TW Hya with the SMA

We present the first images of the 691.473 GHz CO J=6–5 line in a protoplanetary disk, obtained along with the 690 GHz dust continuum, toward the classical T Tauri star TW Hya using the Submillimeter Array. Imaging in the CO J=6–5 line reveals a rotating disk, consistent with previous observations of CO J=3–2 and 2–1 lines. Using an irradiated accretion disk model and 2D Monte Carlo radiative t...