Other
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop..146c&link_type=abstract
Spitzer Proposal ID #146
Other
Scientific paper
We propose to image the inner galaxy from 10 to 70 degrees on either side of the Galactic center and one degree above and below the plane (240 square degrees) in all IRAC and MIPS bands. The survey will be fully sampled in all bands except at 160 µm. It will reach the three natural sensitivity limits: the saturation limit at wavelengths 70 µm and longer; the background limit at 24 µm; and, the confusion limit in the IRAC bands. This survey will be as good as can be obtained with SIRTF or any other telescope regardless of the integration time or observing strategy. It will require less than 20% of the time set aside for SIRTF Legacy programs. This SIRTF survey will: 1) produce a complete census of star formation in the inner galaxy; 2) measure the stellar disk scale length; 3) delineate the stellar structure of the molecular ring, inner spiral arms and bar as traced by the distributions of stars and star formation regions; 4) determine the luminosity and initial mass functions of all nearby star formation regions and clusters down to the stellar limit; 5) detect all young O and B stars still embedded in their natal clouds; 6) detect and identify young stellar objects (surrounded by circumstellar disks) in nearby star forming regions; 7) determine the interstellar extinction law in dense regions for the first time; 8) investigate the nature of Photo Dissociation Regions and the density structure within the interstellar medium; and, 9) detect a host of other types of stars and nebulae such as supernovae, planetary nebulae, hidden galaxies, OH/IR stars, etc. that will be of interest to a large fraction of the community. An additional value of a large, unbiased Galactic plane survey is its potential for new discoveries that might otherwise be missed by piecemeal imaging of selected regions.
Bania Thomas
Benjamin Robert
Cassinelli Joseph
Churchwell Edward
Clemens Daniel
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