New insights: The accretion process and variable wind from TW Hya

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.

X-ray emission from a metal depleted accretion shock onto the classical T Tauri star TW Hya

We present the X-ray spectrum of TW Hya observed at high and intermediate spectral resolution with the Reflection Grating Spectrometer (RGS) and the European Photon Imaging Camera (EPIC) onboard the XMM-Newton satellite. TW Hya is the first classical T Tauri star for which simultaneous X-ray data with both high spectral resolution and high sensitivity were obtained, thus allowing to probe the X...

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...

Imaging the Disk around TW Hya with the Submillimeter Array

We present ∼2-4 aperture synthesis observations of the circumstellar disk surrounding the nearby young star TW Hya in the CO J=2–1 and J=3–2 lines and associated dust continuum obtained with the partially completed Submillimeter Array. The extent and peak flux of the 230 and 345 GHz dust emission follow closely the predictions of the irradiated accretion disk model of Calvet et al. (2002). The ...