Formation of Large-Scale Obscuring Wall and Active Galactic Nucleus Evolution Regulated by Circumnuclear Starbursts

摘要: By considering the radiative force by a circumnuclear starburst as well an active galactic nucleus (AGN), we analyze equilibrium configuration and stability of dusty gas in regions. It is found that intensive can support stable gaseous wall with scale height several hundred parsecs. Moreover, taking simple stellar evolution into account, find covering factor decreases on timescale times 107 yr. The large-scale wall, if formed, works to obscure result dust opacity. Hence, it anticipated index AGN type tends shift from higher lower yr becomes dimmer. On other hand, itself brighter than (e.g., quasar case), no forms. In case, most probably identified 1. present mechanism may provide physical explanation for putative correlation between host properties whereby Seyfert 2 galaxies are more frequently associated starbursts 1 galaxies, whereas quasars mostly observed regardless star-forming activity galaxies.