A new test for cosmic structure based on the anisotropy field of 60-microns extragalactic IRAS sources

Details A new test for cosmic structure based on the anisotropy field of 60-microns extragalactic IRAS sources A new test for cosmic structure based on the anisotropy field of 60-microns extragalactic IRAS sources

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...267l..15f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 1, p. L15-L18.

Astronomy and Astrophysics

Astronomy

6

Angular Distribution, Infrared Astronomy Satellite, Infrared Sources (Astronomy), Space Density, Cosmology, Extragalactic Radio Sources

Scientific paper

We study the angular distribution of 60-microns IRAS sources at 0.6-20 Jy, measuring the rms fluctuation in the source number over the sky at angular scales 2-70 deg and the peak number in the smoothed source density at 1-10 deg. Fitting to the data a simple model (an isotropic field of density perturbations with a single length scale L), irrespective of the cosmic density parameter we get L equal to or greater than 40/h Mpc, with a preferred value of 50/h Mpc. For Omega(0) = 1 we also constrain BV (the biasing factor of infrared sources times the local velocity) to the range 500 - 900 km/sec.

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