A Complete IRAC Map of M31

Details A Complete IRAC Map of M31 A Complete IRAC Map of M31

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3126b&link_type=abstract

Spitzer Proposal ID #3126

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Scientific paper

We propose a complete IRAC map of M31, the Andromeda Galaxy. The mid-infrared window opened by Spitzer will provide a new view of the stellar populations and dust content of this nearest large galaxy and Milky Way analog. The spatial distribution of the aromatic infrared band (AIB) emission will be compared to the UV flux distribution as revealed by GALEX, contributing to the solution of several puzzles raised by ISO observations. The AIB emission will also be compared to other indicators of star formation, such as Halpha, far-IR, and radio emission, at the highest spatial resolution possible for a large external galaxy. Populations of unusual objects such as extremely luminous stars, supernova remnants, and planetary nebulae, have already been well-studied in M31; IRAC observations will serve to characterize these populations in the mid-IR and complete their spectral energy distributions. This program complements existing GTO and Legacy observations, and will provide a rich target list for follow-up observations.

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