The Circumstellar Environment of Low Mass Star Forming Regions

Details The Circumstellar Environment of Low Mass Star Forming Regions The Circumstellar Environment of Low Mass Star Forming Regions

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999stin...9947716b&link_type=abstract

Technical Report, Carnegie Inst. of Tech. Pittsburgh, PA United States

Physics

Spectral Energy Distribution, Stellar Envelopes, Stellar Models, Stellar Evolution, Star Formation, Stellar Physics, T Tauri Stars, Stellar Composition, Stellar Interiors, Angular Resolution, Imaging Techniques, Kuiper Airborne Observatory, Microwave Interferometers, Photometers, Taurus Constellation, Data Acquisition

Scientific paper

The final technical report of the NASA grant project is presented. The goals of the grant were to: (1) analyze the data from the Far-Infrared (FIR) Camera on board the Kuiper Airborne Observatory (KAO); (2) acquire additional data at other wavelengths for models and (4) to develop source models for the Young stellar objects (YSOs)under study. The complete Spectral Energy Distribution (SED) from 10 microns out to 1.3 mm for all sources being studied have been obtained. The FIR imaging data was processed to reveal the maximum angular resolution possible, which allows us to model the disk. To model the disk we have the high resolution millimeter interferometry data. In summary the results to date are: (1) the vast majority of embedded YSOs in Taurus are compact at 100 microns. The models mos consistent with our data and other observations are either dominated by disk emissions, or envelopes that have relatively steep density gradients; (2) the submillimeter/millimeter photometer suggests that models are very successful. Disk emission plays an important role and must be considered when predicting the overall emission. (3) in the two cases, where we seem to have extended emission, we have to investigate other possible source models than a Shu collapse.

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