NOAO >   Observing Info >   Approved Programs >   2010B-0269

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Proposal Information for 2010B-0269


PI: Hsien Shang, Inst. of Astronomy and Astrophysics, Academia Sinica, shang@asiaa.sinica.edu.tw
Address: P.O. Box 23-141, Taipei, Taiwan 10617, Taiwan

CoI: Chun-Fan Liu, Inst. of Astronomy and Astrophysics, Academia Sinica
CoI: Frederick M. Walter, State University of New York at Stony Brook
CoI: Alfred E. Glassgold, University of California, Berkeley

Title: Resolving [NeII] 12.81\micron Line Profiles toward Jet-Driving Young Stars

Abstract: We propose to obtain spectrally resolved [Ne II] 12.81\micron line profiles toward the jet-driving sources HN Tau and RW Aur using Gemini/Michelle in N-band Echelle spectroscopy. Long-slit spectra along the jet axes provide the best diagnostic information for distinguishing origins of the [Ne II] line emissions from young stellar objects. With a resolving power of 30000 and line S/N of 30, we are able to test the X-ray origin of [Ne II] emission from an X-wind. The model line profile features a dominant peak toward the terminal velocity of a jet and a broad wing around the stellar velocity. Combined with profiles from other optical forbidden lines within the same jet, we can understand the mechanisms of ionization and excitation of emission lines from T-Tauri jets, and the kinematics of outflows launched close to the driving sources.


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NOAO >   Observing Info >   Approved Programs >   2010B-0269

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