Young stellar object jet models: From theory to synthetic observations

The Molecular Outtow and Possible Precessing Jet from the Massive Young Stellar Object Iras 20126+4104

We present images of the molecular gas in the IRAS 20126+4104 massive outtow and examine the interaction between the energetic outtowing material and the surrounding molecular cloud. Mosaic interferometric images in CO(1{0), 13 CO(1?0), C 18 O(1?0), C 17 O(1?0), and millimeter continuum emission are compared with mid-infrared images at 12.5 m & 17.9 m, near-infrared images in the K s band (2.17...

Models and Observations of the Chemistry near Young Stellar Objects

Stellar Evolutionary Models: challenges from observations of stellar systems

We briefly review some constraints† for stellar models in various mass regimes and evolutionary stages as provided by observational data from spectroscopy to multi-wavelenghts photometry. The accuracy of present generation of stellar models can be significantly improved only through an extensive comparison between theory and observations.

The Remarkable Mid-infrared Jet of Massive Young Stellar Object G35.20-0.74

The young massive stellar object G35.20-0.74 was observed in the mid-infrared using T-ReCS on Gemini South. Previous observations have shown that the near infrared emission has a fan-like morphology that is consistent with emission from the northern lobe of a bipolar radio jet known to be associated with this source. Mid-infrared observations presented in this paper show a monopolar jet-like mo...

The Intermediate-mass Young Stellar Object 08576nr292: Discovery of a disk-jet system

We present observations of the embedded massive young stellar object (YSO) candidate 08576nr292, obtained with X-shooter and SINFONI on the ESO Very Large Telescope (VLT). The flux-calibrated, medium-resolution X-shooter spectrum (300 – 2500 nm) includes over 370 emission lines, but no (photospheric) absorption lines and is consistent with a reddened disk spectrum. Among the emission lines are ...