Physics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop..114h&link_type=abstract
Spitzer Proposal ID #114
Physics
Scientific paper
Molecular and atomic emission-line images of DR 21 and GGD 37 PI: J.R. Houck Technical contact: Dan Watson DR 21 and GGD 37 (Cep A West) are two of the best-resolved examples of bipolar outflows and shocks from massive young stellar objects. In this program we will use the high-spectral-resolution modules of the IRS to obtained detailed images of emission by molecular hydrogen (three pure rotational lines), water (13 pure rotational lines) , and several low-excitation ions and atoms (e.g. [Si II], [Fe II], [S I] and [Ne II]). The structure of the shocks will be resolved in the images; in particular the dual cloud-shock/jet-shock structures will be cleanly separated in the many nearly-edge-on shock rims in these objects. This provides a unique opportunity -- not possible from suborbital platformas -- for study of the interaction of a YSO outflow and its surrounding cloud, using probes that trace the bulk of the material (H2) as well as the bulk of the radiated energy (H2O) in the shocked gas, and will provide strong constraints on models of the interaction and on the influence of outflows and shocks on ongoing star formation.
Houck James R.
Watson Dan
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