Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.0214r&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #02.14; Bulletin of the American Astronomical Society, Vol. 30, p.1246
Astronomy and Astrophysics
Astronomy
Scientific paper
We present redshifts and luminosities for 60\micron-selected galaxies in a very deep IRAS field in the North Ecliptic Pole region (NEPR) and its immediate periphery. The data set consists of redshifts and IRAS fluxes for 188 sources drawn from coadded and point-source filtered IRAS scans of the pole region with 60\micron \ flux densities bounded between 50 and 210 mJy. This represents a roughly 150% increase in the sample discussed in Ashby et al. (1996). We have compared the redshift distribution of this enlarged infrared-selected sample to a number of evolutionary model predictions. We find the data to be consistent with no evolution, modest (1 + z)(-2) density evolution, or weak luminosity evolution (L ~ e({2tau ) (z)}) (with 68.7%, 43.2%, and 54.4% likelihood of match respectively). The data rule out power-law forms of galaxy luminosity evolution (with beta >= 2) for 60\micron-selected galaxies having redshifts z < 0.2 at the 97% confidence level for the redshifts in this sample. The data also rule out strong density evolution (with alpha >= 4) at better than 90%.
Ashby Matthew L. N.
Hacking Perry B.
Houck James R.
Rinehart Stephen Andrew
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