All c2d Spitzer Outflows

Details All c2d Spitzer Outflows All c2d Spitzer Outflows

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40728g&link_type=abstract

Spitzer Proposal ID #40728

Computer Science

Scientific paper

Protostellar outflows can be well identified as diffuse knots in Spitzer IRAC images. We therefore propose to systematically search and characterize all outflows covered by the most extensive Spitzer imaging survey of local star formation, the Cores to Disks (c2d) Spitzer Legacy Program. This would create an extensive, homogenously studied (publicly available) legacy-style outflow sample without biases, likely the most comprehensive one available to date. It would replace existing studies that usually employ different methods for different regions, and do never probe a volume of the scale covered by c2d (5 large cloud complexes and about 90 isolated dense molecular cores). Our homogenous approach would, e.g., also allow to see known outflows in a new light, since existing analysis (e.g., on the geometry) is hard to compare between different samples. Furthermore, also young stellar objects can be well identified and characterized using Spitzer IRAC and MIPS images. This allows to probe the sources driving outflows, again in a more homogenous fashion than possible for previous studies. Based on existing complementary c2d data, which covers the 1 to 1000 micron wavelength range, we would derive protostellar properties (like bolometric luminosity and temperature) and associate these with the outflow properties. Thus, Spitzer?s unparalleled sensitivity to both outflows and stars offers the unique chance to systematically relate the properties of outflows to the ones of the driving sources without biases. No grande-scale study of this type has been conducted so far, in particular none relying on a single, homogenous dataset covering a significant fraction of the local star formation. Our survey would, e.g., be critical in gauging the relative abundance of parsec-scale, ?S-shaped?, and quadrupolar outflows. This is important, given that such flows provide significant energy transfer over large (cloud-size) scales, possibly indicate jet precession, and may hint at protostellar binaries, respectively.

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