Spectral Line Diagnostics of Shocks and Photon-Dominated Regions

Details Spectral Line Diagnostics of Shocks and Photon-Dominated Regions Spectral Line Diagnostics of Shocks and Photon-Dominated Regions

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...28f&link_type=abstract

Spitzer Proposal ID #28

Physics

Scientific paper

We will use the step-and-stare mode of IRS to observe the sources S140, NGC 7023, and HH54, obtaining spectral line maps of regions of size ~ 55 x 55 arcsec (45 x 45 arcsec for HH54) using the Short-Lo, Short-Hi and Long-Hi modules. These observations will yield maps of the emission line intensities for several rotational transitions of H2 and H2O and many fine structure lines of atoms and atomic ions. The scientific goal is to study the spatial variation in gas temperature, density, H2 ortho-to-para ratio, water abundance and ionization conditions within the three sources studied, thereby enhancing our physical understanding of interstellar shock waves and photodissociation regions.

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