TitleSpitzer Observations of Passive and Star-Forming Early-Type Galaxies: An Infrared Color-Color Sequence
AuthorsTemi, Pasquale; Brighenti, Fabrizio; Mathews, William G.
Bibcode2009ApJ...707..890T
AbstractWe describe the infrared properties of a large sample of early-type galaxies, comparing data from the Spitzer archive with Ks-band emission from the Two Micron All Sky Survey. While most representations of this data result in correlations with large scatter, we find a remarkably tight relation among colors formed by ratios of luminosities in Spitzer-Multiband Imaging Photometer bands (24, 70, and 160 μm) and the Ks ...
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