Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135...39s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 1, June 1984, p. 39-44.
Astronomy and Astrophysics
Astrophysics
17
Cosmology, Decimeter Waves, Extragalactic Radio Sources, Radiant Flux Density, Radio Spectra, Statistical Correlation
Scientific paper
The statistical variation of decimetre-wavelength spectral index (α) with 408 MHz flux density (S408) reported by the authors for radio sources found in metre-wavelength surveys is reexamined. The present analysis involves a total of 1009 sources appearing 7 metre-wavelength samples with median flux densities in the range 0.1 < S408 < 14 Jy. Near both the high and low flux density limits, the median value of α is found to be about -0.80, steepening significantly to -0.90 at intermediate flux densities (S408 ≡ 2 Jy). Such a correlation supports the previously reported results and is potentially useful for cosmological studies.
Gopal-Krishna
Steppe H.
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