TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 65 (No. 10), pp. 1109-1116, 2013

Clustering of far-infrared galaxies in the AKARI All-Sky Survey North

A. Pollo1,2, T. T. Takeuchi3, A. Solarz3, P. Rybka3, T. L. Suzuki3, A. Pępiak2, and S. Oyabu3

1National Centre for Nuclear Research, Hoża 69, 00-681 Warsaw, Poland
2Astronomical Observatory of the Jagiellonian University, Orla 171, 30-001 Cracow, Poland
3Division of Particle and Astrophysical Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan

(Received December 17, 2012; Revised May 26, 2013; Accepted June 18, 2013; Online published October 24, 2013)

Abstract: We present the measurements of the angular two-point correlation function for AKARI 90-μm point sources, detected outside the Milky Way plane and other regions characterized by high Galactic extinction in the northern Galactic hemisphere, and categorized as extragalactic sources according to our far-infrared-color based criterion. Together with our previous work (Pollo et al., 2013) this is the first measurement of the large-scale angular clustering of galaxies selected in the far-infrared after IRAS. We present the first attempt to estimate the spatial clustering properties of AKARI All-Sky galaxies and we conclude that they are mostly a very nearby (z ≤ 0.1) population of moderately clustered galaxies. We measure their correlation length r0 ∼ 4.5 h-1 Mpc, which is consistent with the assumption that the FIS AKARI All-Sky surveys observes mostly a nearby star-forming population of galaxies.
Key words: Galaxies, clustering, large-scale structure, dust, infrared, cosmology.

Corresponding author E-mail: apollo@fuw.edu.pl

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