Astrophysics (index)about

Radio Source Counts

(Source Counts)
(using radio source population characteristics to determine curvature)

In Cosmology, Radio Source Counts (or just Source Counts) is a method of detecting the Curvature of space. In a flat, Euclidean space, a uniform distribution of Radio sources (the scale of interest being cosmological distances, i.e., Radio Galaxies), with the same distribution of Luminosities throughout, implies a certain pattern to the count of detectable sources at each luminosity:

log N = -1.5 log S

Divergence from this gives information about the geometry of the universe over time.


(cosmology,radio)
http://en.wikipedia.org/wiki/Source_counts
https://ned.ipac.caltech.edu/level5/Sept04/Condon/Condon4_2.html

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