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

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/167330· OSTI ID:5695149

Lonsdale, C J; Hacking, P B

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. 81 refs.

• Research Organization: California Institute of Technology, Pasadena (USA)
• OSTI ID: 5695149
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 339; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGY
DENSITY
ELECTROMAGNETIC RADIATION
FLUX DENSITY
GALACTIC EVOLUTION
GALAXIES
INFRARED RADIATION
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIANT FLUX DENSITY
RADIATIONS
RED SHIFT
SPECTROSCOPY
SURVEYS