Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1K036

The Spitzer Mid-IR Proper Motions of the Cep E/HH 377 Outflow

Noriega-Crespo, A. (California Institute of Technology)
Raga, A.C. (Centro de Ciencias Nucleares-UNAM)
Moro-Martin, A. (Center for Astrobiology-CSIC)
Carey, S. (California Institute of Technology)
Flagey, N. (Jet Propulsion Laboratory-Caltech)

We have used multiple epoch high angular resolution (~0.8 arcsecond) observations at 4.5micron obtained with IRAC of the compact (~1.4 arcmin) young stellar bipolar outflow Cep E to measure for first time in the mid-IR the proper motion of its brightest condensations. We found that for a distance of 730pc, the tangential velocities of the North and South outflows are ~62 and94 km/s,respectively, and moving away from the central source roughly along the major axis of the flow. The emission at 4.5micron is dominated by H2 pure rotational emission lines, so this confirms that the H2 gas moves at highly supersonic velocities.

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