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Rapid Formation of Molecular Clouds and Stars in the Solar Neighborhood
Lee Hartmann, Javier Ballesteros-Paredes, Edwin A. Bergin
Observations of both star-forming regions and young, gas-free stellar associations indicate that most nearby molecular clouds form stars only over a short time span before dispersa…
Disk Accretion at 10 Myr: Results from the TW Hydrae Association
James Muzerolle, Lynne Hillenbrand, Nuria Calvet +2
We present an analysis of the accretion properties of the members of the TW Hydrae association. The Halpha emission line profile provides explicit evidence of an active accretion f…
Mid-Infrared Imaging of Candidate Vega-Like Systems
Ray Jayawardhana, R. Scott Fisher, Charles M. Telesco +4
We have conducted deep mid-infrared imaging of a relatively nearby sample of candidate Vega-like stars using the OSCIR instrument on the CTIO 4-meter and Keck II 10-meter telescope…
Accretion Disks Around Young Objects. III. Grain Growth
Paola D'Alessio, Nuria Calvet, Lee Hartmann
We present detailed models of irradiated T Tauri disks including dust grain growth with power-law size distributions. The models assume complete mixing between dust and gas and sol…