Chapter VII Quasistellar Objects

概要

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The purpose of this paper is to review and develop further our theory of QSOs. According to this theory a QSO is an active stage in the evolution of a galaxy, where successive explosions occur in condensations in the nucleus during〜10^4y. The condensation is a system of gas and stars with mass〜10^5M⊙. We determine newly luminosity functions at three different epochs and using these luminosity functions estimate the lifetime of the active stage of a QSO-QSO (Q) stage-as 〜10^4y. It is shown that observational results at high frequencies (≥3 GHz) of very small radio structures (≤10^<3〃>, the radio spectrum and its time variations can be consistently explained by synchrotron radio emission from a single expanding plasma cloud produced by an explosion in a condensation. This cloud contains relativistic electrons and magnetic field and is optically thick for radio waves in the initial stage of expansion. Energy supply from the condensation to the cloud continues for 10〜30y. These explosions occur every 30〜70y. Observational results at low frequencies (0.3〜3GHz) of radio structures (〜10^<2〃>) and spectral shapes can be explained as the superposition of radio emission from a large number of expanding clouds. Evolution of a composite sources is discussed on the luminosity versus the volume emissivity diagram.
1972-02-29