Decoding the colors of the interstellar medium

Details Decoding the colors of the interstellar medium Decoding the colors of the interstellar medium

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40031f&link_type=abstract

Spitzer Proposal ID #40031

Physics

Scientific paper

The Infrared Array Camera is very sensitive to diffuse emission, and its multi-band architecture has enabled Legacy Surveys of the inner Galactic Plane (GLIMPSE+MIPSGAL) and the Large Magellanic Cloud (SAGE). Inspection of these large-scale imaging surveys reveals extended emission with distinct colors. The vast majority of diffuse emission has color characteristics of polycyclic aromatic hydrocarbons (PAH), with proportions in IRAC channels 1:2:3:4 of 4:6:35:100. As a key to decoding these colors we selected 10 lines of sight with distinct colors (7 in the Milky Way and three in the LMC) and propose to observe these fields using IRS to measure the diffuse emission.

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