Orientation and Evolutionary Effects in Active Galactic Nuclei
نویسندگان
چکیده
In this review I present observational results of active galactic nuclei that my colleagues and I have recently obtained. I discuss their significance in terms of unification schemes and evolutionary scenarios.
منابع مشابه
Evolutive unification in composite Active Galactic Nuclei
In this paper we explore an evolutionary Unified scenario involving super massive black hole (SMBH) and starburst (SB) with outflow, that seems capable of explaining most of the observational properties –of at least part– of AGNs Our suggestion is explored inside the expectations of the Starburst model close associated with the AGN where the narrow line region (NLR), broad line region (BLR) and...
متن کاملThe evolutionary sequence of active galactic nuclei and galaxy formation revealed
Today, almost every galaxy spheroid contains a massive black hole: a remnant of, and testament to, a period in its evolution when it contained an active galactic nucleus (AGN). However, the sequence and timescales of the formation of the black hole and surrounding spheroid of stars are completely unknown, leaving a large gap in our knowledge of how the Universe attained its present appearance. ...
متن کاملAGN Zoo and Classications of Active Galaxies
We review the variety of Active Galactic Nuclei (AGN) classes (so-calledAGN zoo") and classification schemes of galaxies by activity types based on their optical emission-line spectrum, as well as other parameters and other than optical wave-length ranges. A historical overview of discoveries of various types of active galaxies is given, including Seyfert galaxies, radio galaxies, QSOs, BL Lace...
متن کاملImaging of Ultraluminous Infrared Galaxies in the Near-UV
We present the first ground-based U (λcentral =3410Å, ∆λ=320Å) images of Ultraluminous Infrared Galaxies (ULIGs). Two samples were observed: (1) “warm” ULIGs with mid-infrared colors characteristic of active galactic nuclei (f25μm/f60μm >0.2), which are believed to represent a critical transition phase between cooler ULIGs and optically selected QSOs according to a previously proposed evolution...
متن کاملLow Luminosity Radio Loud Active Galactic Nuclei
I review observational properties of low power radio loud AGN. High resolution VLBI observations allow the estimate of the jet velocity and orientation with respect to the line of sight and the determination of the Doppler factor. These data reveal rich structures, including two-sided jets and secondary components. New results on 1144+35, a giant radio source with superluminal motion are shown ...
متن کامل