Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21940703v&link_type=abstract
American Astronomical Society, AAS Meeting #219, #407.03
Mathematics
Logic
Scientific paper
The Spitzer IRAC and MIPS bands offer a unique resource to study a wide range of components simultaneously: protostars; protostellar disks, jets and outflows; protostellar envelopes and cores. In the short wavelength IRAC bands the outflow cones are observable in scattered light from the protostar. Each IRAC band contains several of the H2 rotational lines, thus the H2 molecular jets and bow shocks are readily identifiable in all IRAC bands, while the hottest atomic/ionic gases in the jet heads are identifiable in the MIPS 24 micron band which contains a few atomic/ionic emission lines. Here we report the results from our ADAP-sponsored program to study the protostellar jets and outflows in the Spitzer Archive. We use HiRes deconvolution of the Spitzer images to improve the visualization of spatial morphology by enhancing resolution (to sub-arcsec for IRAC bands and 1.8″ for MIPS 24 micron) and by removing the contaminating sidelobes from bright sources. As an example of the result of combining the high sensitivity in Spitzer images and reprocessing with HiRes, we detected the following new jet and outflow features in Cep E: wide angle outflow seen in the scattered light; morphological details of at least 29 jet driven bow shocks; three atomic/ionic line emission features in 24 micron compact features, identified as jet heads; and, a flattened protostellar envelope seen as an 8 micron absorption band against the interstellar background PAH emission. While the IRS H2 spectral line maps of protostellar jets are very limited, our results show that the IRAC images available in the Spitzer archives have the potential to study the H2 emission in a large sample of outflow sources. This ADAP-sponsored research was conducted at the Jet Propulsion Laboratory, California Institute of Technology under contract with the National Aeronautics and Space Administration.
Langer William D.
Velusamy Thangasamy
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