Galaxy evolution and large-scale structure in the far-infrared. I - IRAS pointed observations

Details Galaxy evolution and large-scale structure in the far-infrared. I - IRAS pointed observations Galaxy evolution and large-scale structure in the far-infrared. I - IRAS pointed observations

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339..712l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 339, April 15, 1989, p. 712-728.

Astronomy and Astrophysics

Astronomy

37

Cosmology, Galactic Evolution, Infrared Astronomy Satellite, Infrared Sources (Astronomy), Red Shift, Sky Surveys (Astronomy), Astronomical Spectroscopy, Density Distribution, Luminosity, Radiant Flux Density, Southern Sky

Scientific paper

Redshifts for 66 galaxies were obtained from a sample of 93 60-micron sources detected serendipitously in 22 IRAS deep pointed observations, covering a total area of 18.4 sq deg. The flux density limit of this survey is 150 mJy, 4 times fainter than the IRAS Point Source Catalog (PSC). The luminosity function is similar in shape with those previously published for samples selected from the PSC, with a median redshift of 0.048 for the fainter sample, but shifted to higher space densities. There is evidence that some of the excess number counts in the deeper sample can be explained in terms of a large-scale density enhancement beyond the Pavo-Indus supercluster. In addition, the faintest counts in the new sample confirm the result of Hacking et al. (1989) that faint IRAS 60-micron source counts lie significantly in excess of an extrapolation of the PSC counts assuming no luminosity or density evolution.

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