Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-30T02:49:26.254Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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.

Type
Extragalactic
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 79 - 80
Copyright
Copyright © Reidel 1988 

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