The long-term evolution of barred galaxies

Details The long-term evolution of barred galaxies The long-term evolution of barred galaxies

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..161l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 1, 1991, p. 161-170. Research supported by NSE

Astronomy and Astrophysics

Astronomy

47

Astronomical Models, Barred Galaxies, Galactic Evolution, Many Body Problem, Angular Momentum, Galactic Rotation, Gravitational Effects, Halos, Spiral Galaxies

Scientific paper

The long-term dynamical evolution of barred galaxies is investigated, using flat, fully self-gravitating, bar-unstable, disk-halo models. The models develop rapidly rotating bars which subsequently slow through roughly equal transfers of angular momentum to the outer disk and to the halo. Once the bars are well formed, their pattern speeds decline approximately linearly with time, and it is concluded that even in the absence of visible spiral patterns, a low-amplitude trailing response can continue to slow bars significantly for about 10 Gyr. The experiments suggest that a typical bar will slow by a factor of about 2 in a Hubble time.

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