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

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168963· OSTI ID:6576802

Lonsdale, C J; Hacking, P B; Conrow, T P; Rowan-Robinson, M ^[1]

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1. JPL, Pasadena, CA (USA) Queen Mary College, London (England)

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. 105 refs.

• OSTI ID: 6576802
• Journal Information: Astrophysical Journal; (USA), Vol. 358; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALACTIC EVOLUTION
GALAXIES
INFRARED RADIATION
SPATIAL DISTRIBUTION
ANISOTROPY
FLUX DENSITY
GALAXY CLUSTERS
MAPS
MASS DISTRIBUTION
DISTRIBUTION
ELECTROMAGNETIC RADIATION
RADIATIONS
640105* - Astrophysics & Cosmology- Galaxies
640106 - Astrophysics & Cosmology- Cosmology