Warm Molecular Hydrogen and Ionized Neon in the HH 2 Outflow
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چکیده
We report on spectro-imaging observations of the Herbig-Haro 2 outflow with the ISOCAM camera onboard the Infrared Space Observatory (ISO). The [Ne II] 12.81μm and [Ne III] 15.55μm lines are detected only towards the jet working surface (HH 2H), consistent with the high excitation of this knot in the optical range, while H2 pure rotational emission is found all over the shocked region HH 2. The low energy transition S(2) traces warm gas (T ∼ 400K) peaked towards knots E-F and extended ejecta (T ∼ 250−380K) with masses of a few 10 M⊙ in the high-velocity CO outflow extending between the powering source and HH 2. Such emission could arise from low-velocity C-type shocks
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تاریخ انتشار 2007