Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714807h&link_type=abstract
American Astronomical Society, AAS Meeting #217, #148.07; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
We present Spitzer and GALEX spectral energy distributions (SEDs) for a sample of brightest cluster galaxies (BCGs). The BCG sample was selected from the Chandra archive, to have uniformly and well-measured X-ray cluster gas profiles for temperature, density, and entropy (Cavagnolo et al. 2009). The galaxy SEDs include data from GALEX [124 galaxies] , 2MASS [202 galaxies], and Spitzer IRAC [108 galaxies] and MIPS [83 galaxies]. These spectral energy distributions are fit to Siebenmorgen and Krügel (2006) starburst galaxy models in the IR and Groves et al. (2008) star formation models which span the IR through the UV, as well as an SED for an old stellar population. This sample provides a good baseline for the colors to expect from a quiescent BCG, since this sample includes BCGs that do not inhabit cool core clusters. We confirm the trend for BCGs in systems with low central hot gas entropy to have UV and mid-IR emission in excess over that expected from a quiescent BCG. We compare the star formation signatures in the BCGs with those from star-forming and starburst galaxies and find that their IR/UV ratios are similar to other star-forming galaxies, while their FUV-NUV colors might be somewhat bluer.
Barthélémy R.
Donahue Megan
Hicks Amalia
Hoffer Aaron Scott
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