Open AccessThe clustering of sub‐mJy radio sources in the Bootes Deep Field
Author(s) -
Wilman R. J.,
Röttgering H. J. A.,
Overzier R. A.,
Jarvis M. J.
Publication year - 2003
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2003.06215.x
Subject(s) - physics , astrophysics , galaxy , radio galaxy , cluster analysis , astronomy , luminous infrared galaxy , field (mathematics) , statistics , mathematics , pure mathematics
We measure the angular clustering of ∼2000 radio sources in the Bootes Deep Field, covering 5.3 deg 2 down to S 1.4GHz = 0.2 mJy . With reference to work by Blake & Wall, we show that the size distribution of multi‐component radio galaxies dominates the overall clustering signal, and that its amplitude extrapolates smoothly from their measurements above 5 mJy. The upper limits on any true galaxy–galaxy clustering are consistent with the clustering of sub‐mJy radio‐loud active galatic nuclei (AGN) being effectively diluted by the more weakly clustered IRAS ‐type starburst galaxies. Source count models imply that the survey contains ≃400 of the latter galaxies above 0.2 mJy out to z ∼ 1–2 . Measurement of their clustering must await their identification via the optical and infrared data due on this field.