naa a22 4500 51073202X CHVBK 20180411082956.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1134/S1063772913060036 doi (NATIONALLICENCE)springer-10.1134/S1063772913060036 AGN III—primordial activity in the nuclei of disk galaxies with pseudobulges [Elektronische Daten] [B. Komberg, A. Ermash] Observational data on the evolution of quasars and galaxies of various morphological types and numerical simulations carried out by various groups are used to argue that low-redshift (z < 0.5) quasars of types I and II, identified with massive elliptical and spiral galaxies with classical bulges, cannot be undergoing a single, late phase of activity; i.e., their activity cannot be "primordial,” and must have "flared up” at multiple times in the past. This means that their appearance at low z is associated with recurrence of their activity—i.e., with major mergers of gas-rich galaxies (so-called wet major mergers)—since their lifetimes in the active phase do not exceed a few times 107 yrs. Only objects we have referred to earlier as AGN III, which are associated with the nuclei of isolated, late-type spiral galaxies with low-mass, rapidly-rotating "pseudobulges,” could represent primordial AGNs at low z. The black holes in such galaxies have masses M BH < 107 M ⊙, and the peculiarities of their nuclear spectra suggest that they may have very high specific rotational angular momenta per unit mass. Type I narrow-line (widths less than 2000 km/s) Seyfert galaxies (NLSyIs) with pseudobulges and black-hole masses M BH < 107 M ⊙ may be characteristic representatives of the AGN III population. Since NLSyI galaxies have pseudobulges while Type I broad-line Seyfert galaxies have classical bulges, these two types of galaxies cannot represent different evolutionary stages of a single type of object. It is possible that the precursors of NLSyIs are "Population A” quasars. Pleiades Publishing, Ltd., 2013 Komberg B. Astro Space Center, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia aut Ermash A. Astro Space Center, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia aut Astronomy Reports SP MAIK Nauka/Interperiodica 57/6(2013-06-01), 401-409 1063-7729 57:6<401 2013 57 11444 https://doi.org/10.1134/S1063772913060036 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772913060036 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Komberg B. Astro Space Center, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Ermash A. Astro Space Center, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 773 0- Astronomy Reports SP MAIK Nauka/Interperiodica 57/6(2013-06-01), 401-409 1063-7729 57:6<401 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer