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A Massive Z = 0.088 Supercluster and Tests of Starburst Galaxy Evolution at the North Ecliptic Pole

1996; IOP Publishing; Volume: 456; Linguagem: Inglês

10.1086/176667

1538-4357

M. L. N. Ashby, P. Hacking, J. R. Houck, B. T. Soifer, Eric W. Weisstein,

Stellar, planetary, and galactic studies

view Abstract Citations (33) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Massive Z = 0.088 Supercluster and Tests of Starburst Galaxy Evolution at the North Ecliptic Pole Ashby, M. L. N. ; Hacking, Perry B. ; Houck, J. R. ; Soifer, B. T. ; Weisstein, E. W. Abstract We present redshifts and luminosities for galaxies in a very deep IRAS field around the north ecliptic pole region (NEPR). The redshift data set consists of 76 sources drawn from co-added and point source filtered IRAS scans of the pole region with 60 microns flux densities bounded between 210 and 50 mJy. This is, therefore, the deepest flux-limited far-infrared sample yet assembled: it extends out to a median redshift of z = 0.080. The sample is strongly clustered in redshift space, with one very strong concentration at z = 0.088, and at least four weaker clusters. The observed portion of the z = 0.088 cluster has a surface density of galaxies more than three times as dense as the Great Wall. This is the deepest far-infrared selected sample yet to become available for tests of starburst galaxy evolution. We have compared the redshift distribution of a subsample to evolutionary models and find the data consistent with either mild (L ∝ [1 + z]1-2) luminosity evolution, mild (p ∝ [1 + z]1-2) comoving density evolution, or no evolution. It is difficult, however, to distinguish between true evolution and the effects of large-scale structure in a sample of this size. Publication: The Astrophysical Journal Pub Date: January 1996 DOI: 10.1086/176667 Bibcode: 1996ApJ...456..428A Keywords: GALAXIES: CLUSTERS: GENERAL; GALAXIES: DISTANCES AND REDSHIFTS; GALAXIES: STARBURST; INFRARED: GALAXIES full text sources ADS | data products NED (120) SIMBAD (100)