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The CIDA-QUEST Large Scale Variability Survey in the Orion OB Association: initial results
Cesar Briceno, A. Katherina Vivas, Nuria Calvet +2
Using the 8k x 8k CCD Mosaic Camera on the 1m Schmidt telescope in Venezuela, we are conducting a large-scale, deep optical, multiepoch, photometric (BVRIHa) survey over 120 sq.deg…
Accretion Disks Around Young Objects. II. Tests of Well-Mixed Models with Ism Dust
Paola D'Alessio, Nuria Calvet, Lee Hartmann +2
We construct detailed vertical structure models of irradiated accretion disks around T Tauri stars with interstellar medium dust uniformly mixed with gas. The dependence of the str…
Turbulent Flow-Driven Molecular Cloud Formation: A Solution to the Post-T Tauri Problem?
Javier Ballesteros-Paredes, Lee Hartmann, Enrique Vazquez-Semadeni
We suggest that molecular clouds can be formed on short time scales by compressions from large scale streams in the interstellar medium (ISM). In particular, we argue that the Taur…
A disk census for the nearest group of young stars: Mid-infrared observations of the TW Hydrae Association
Ray Jayawardhana, Lee Hartmann, Giovanni Fazio +3
A group of young, active stars in the vicinity of TW Hydrae has recently been identified as a possible physical association with a common origin. Given its proximity (50 pc),…
The complex protostellar source IRAS 04325+2402
Lee Hartmann, Nuria Calvet, Lori Allen +2
We report Hubble Space Telescope near-infrared NICMOS observations of a remarkable low-luminosity Class I (protostellar) source in the Taurus Molecular Cloud. IRAS 04325+2402 exhib…
Mid-infrared imaging of the young binary star Hen 3-600: Evidence for a dust disk around the primary
Ray Jayawardhana, Lee Hartmann, Giovanni Fazio +3
We present high-resolution mid-infrared observations of the nearby late-type young binary system Hen 3-600. The binary, at a distance of 50 pc, could be a member of the TW H…