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Tests for a Relativistic Beaming Model Using a VLBI Survey

Published online by Cambridge University Press:  03 August 2017

Makoto Inoue
Makoto Inoue*
Affiliation:
Nobeyama Radio Observatory, Nobeyama, Minamisaku, Nagano 384-13, Japan

Abstract

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We have examined a relativistic beaming model using a VLBI survey by Preston et al. (1985). Our statistical study of a ratio R of the flux density for the beamed compact core to that for unbeamed components of a source shows Lorentz factor γ to be ≅ 6 and RT (R at transverse alignment) to be ≅ 10−2 for a sample of 222 QSO's. In addition, we find that a sample of 60 radio galaxies show the beaming effect with γ ≅ 4. It should be emphasized here that the beaming effect strongly affects the source counts (Log N - Log S) especially at high frequencies.

References

Orr, M.J.L. and Browne, I.W.A. 1986, Mon. Not. R. astr. Soc., 200, 1067.Google Scholar
Preston, R.A. et al. 1985, Astron. J., 90, 1599.CrossRefGoogle Scholar