naa a22 4500 510790488 CHVBK 20180411083318.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1134/S1063773713020072 doi (NATIONALLICENCE)springer-10.1134/S1063773713020072 Polyachenko E. Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, 119017, Moscow, Russia aut Galactic bar: Normal mode of the stellar disk or a superposition of transient spirals? [Elektronische Daten] [E. Polyachenko] Several mechanisms of bar mode formation in stellar galactic disks, including the Toomre swing amplification mechanism and modal approaches, are considered. Using the well-known Kuzmin-Toomre stellar disk model as an example, it has been shown through numerical simulations that the stellar bar results from the development of an unstable normal mode. The pattern speed and the spiral wave growth rate found from a numerical experiment agree well with the linear perturbation theory. The nonlinear evolution of the bar is traced. The possible role of growing transient spirals in the formation of bars is discussed. Pleiades Publishing, Ltd., 2013 galaxies nationallicence galactic disks nationallicence Astronomy Letters SP MAIK Nauka/Interperiodica 39/2(2013-02-01), 72-82 1063-7737 39:2<72 2013 39 11443 https://doi.org/10.1134/S1063773713020072 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713020072 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Polyachenko E. Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, 119017, Moscow, Russia aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/2(2013-02-01), 72-82 1063-7737 39:2<72 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer