The dynamics of gas around active galactic nuclei

M. A. Dopita*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    This paper examines the relationship between the accretion flows into the accretion disk around the black holes of active galactic nuclei (AGN), and the jets which they produce. A large-scale accretion flow around the nucleus is proposed as the thick dusty toroid structure of the unified model. Physically, this is similar to the Kahn 'cocoon star' model. High (super-Eddington) accretion rates into the accretion disk are needed. It is assumed that all black holes produce relativistic jets. However, entrainment of thermal (wind) material into the jet determines the AGN class, radio-loud or radio quiet. The jet interacts with the ambient medium as it expands, generating a cocoon of fast radiative or partially-radiative shocks around it. Such a model can explain both the radio properties and the emission line properties over a wide variety of AGN classes.

    Original languageEnglish
    Pages (from-to)79-89
    Number of pages11
    JournalAstrophysics and Space Science
    Issue number1-3
    Publication statusPublished - 2000


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