The Mid-Infrared Environments of High-Redshift Radio Galaxies

Details The Mid-Infrared Environments of High-Redshift Radio Galaxies The Mid-Infrared Environments of High-Redshift Radio Galaxies

2012-02-20

arxiv.org/abs/1202.4489v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 7 figures, 3 tables, accepted for publication in ApJ

Scientific paper

Taking advantage of the impressive sensitivity of Spitzer to detect massive galaxies at high redshift, we study the mid-infrared environments of powerful, high-redshift radio galaxies at 1.2-0.1 (AB), in the fields of 48 radio galaxies at 1.21.2. Using a counts-in-cell analysis, we identify a field as overdense when 15 or more red IRAC sources are found within 1arcmin (i.e.,~0.5Mpc at 1.21.2.

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