Galaxy evolution and large-scale structure in the far-infrared. II - The IRAS faint source survey

Details Galaxy evolution and large-scale structure in the far-infrared. II - The IRAS faint source survey Galaxy evolution and large-scale structure in the far-infrared. II - The IRAS faint source survey

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358...60l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, July 20, 1990, p. 60-80.

Astronomy and Astrophysics

Astronomy

101

Faint Objects, Galactic Clusters, Galactic Evolution, Infrared Sources (Astronomy), Astronomical Maps, Infrared Astronomy, Infrared Astronomy Satellite, Satellite Observation

Scientific paper

The new IRAS Faint Source Survey data base is used to confirm the conclusion of Hacking et al. (1987) that the 60 micron source counts fainter than about 0.5 Jy lie in excess of predictions based on nonevolving model populations. The existence of an anisotropy between the northern and southern Galactic caps discovered by Rowan-Robinson et al. (1986) and Needham and Rowan-Robinson (1988) is confirmed, and it is found to extend below their sensitivity limit to about 0.3 Jy in 60 micron flux density. The count anisotropy at f(60) greater than 0.3 can be interpreted reasonably as due to the Local Supercluster; however, no one structure accounting for the fainter anisotropy can be easily identified in either optical or far-IR two-dimensional sky distributions. The far-IR galaxy sky distributions are considerably smoother than distributions from the published optical galaxy catalogs. It is likely that structure of the large size discussed here have been discriminated against in earlier studies due to insufficient volume sampling.

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