A WISE/GALEX Study of Massive Early Type Galaxies with UV Excess
Abstract
The NASA Wide Field Infrared Explorer (WISE) is an all-sky survey mission imaging at 4 bands between 3.4 and 22 μm. This new dataset has already discovered some of the most massive, IR luminous objects in the Universe. Nearby early type galaxies are matched using the GALEX/SDSS Medium Imaging Survey sample with the Wide-field Infrared Survey (WISE) catalog. We use our new IR perspective to study massive, early type galaxies. The WISE colors are used to constrain the presence of dust or PAH emission (for those objects with low levels of star formation), or to discern the presence of hidden or low level AGN across the red sequence., Of special interest are the properties of galaxies that fall in the green valley of the UV-optical CMD. We use the GALEX NUV, and the WISE 3.4, 4.6, 12 and 22 μm photometry to define this color space for massive early types with ongoing star-formation and known AGN.
- Publication:
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American Astronomical Society Meeting Abstracts #217
- Pub Date:
- January 2011
- Bibcode:
- 2011AAS...21733317P