Nearby Galaxies with Spitzer
D. Calzetti (U Massachusetts), R.C. Kennicutt (IoA-Cambridge), D.A., Dale (U Wyoming), B.T. Draine (Princeton U), C.W. Engelbracht (U Arizona), A., Gil de Paz (U Complutense de Madrid), K.D. Gordon (STScI), J.C. Munoz-Mateos, (U Complutense de Madrid), E.J. Murphy (SSC-Caltech)
TL;DR
This review discusses how the Spitzer Space Telescope has advanced our understanding of nearby galaxies, focusing on PAH physics, star formation indicators, and diagnostics for distinguishing emission sources.
Contribution
It summarizes key developments enabled by Spitzer in understanding galaxy infrared properties and emission mechanisms.
Findings
Enhanced understanding of PAH features in galaxy spectra
Refined infrared-based star formation rate indicators
Improved diagnostics for separating thermal and non-thermal emission
Abstract
We review the main advances brought by the Spitzer Space Telescope in the field of nearby galaxies studies, concentrating on a few subject areas, including: (1) the physics of the Polycyclic Aromatic Hydrocarbons that generate the mid-infrared features between ~3.5 micron and ~20 micron; (2) the use of the mid- and far-infrared emission from galaxies as star formation rate indicators; and (3) the improvement of mid-infrared diagnostics to discriminate between thermal (star-formation) and non-thermal (AGN) emission in galaxies and galaxy centers.
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Scientific Research and Discoveries