Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543610a&link_type=abstract
American Astronomical Society, AAS Meeting #215, #436.10; Bulletin of the American Astronomical Society, Vol. 42, p.385
Astronomy and Astrophysics
Astronomy
Scientific paper
We examine a sample of 41 X-ray-selected clusters at moderate redshift (0.35 ≤ z ≤0 .90) using images from the Spitzer Space Telescope's Infrared Array Camera (IRAC). After reducing the data with MOPEX and APEX to generate clean, calibrated images, we complete statistical background subtraction to determine the luminosity functions of the clusters in the four IRAC channels. This enables us to study how the characteristic magnitude M* varies with redshift and cluster mass - variations that probe the integrated star formation history of the cluster galaxies. We then use the channel 4 (8.0 micron) images to investigate the evolution of AGN and dusty star formation in the clusters. Companion posters study the evolution of dusty star formation with MIPS 24-micron images and the evolution of scaling relations. This study represents the largest sample of moderate-redshift X-ray clusters observed with Spitzer to date.
Arnold Rachel Leigh
Finn Rose A.
Rines Ken
Svoboda Brian E.
Vikhlinin Alexey
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