Gas Feedback and Angular Momentum Redistribution in Barred Galaxies within Dark Matter Halos

Berentzen, I.; Shlosman, I.; Martínez-Valpuesta, I.; Heller, C. H.
Referencia bibliográfica

Pathways Through an Eclectic Universe ASP Conference Series, Vol. 390, proceedings of the conference held 23-27 April, 2007 at Santiago del Teide, Tenerife, Spain. Edited by J. H. Knapen, T. J. Mahoney, and A. Vazdekis San Francisco: Astronomical Society of the Pacific, 2008., p.382

Fecha de publicación:
6
2008
Número de autores
4
Número de autores del IAC
0
Número de citas
0
Número de citas referidas
0
Descripción
We have analyzed the effects of gas on the disk-halo evolution in barred galaxies using N-body/SPH simulations. Our main focus has been the angular momentum (J)~redistribution mediated by the stellar bar and the subsequent evolution of the galactic disk. We find that the stellar bars in disks with 0-8 percent gas fraction are primarily affected by the growth of a central mass concentration owing to the bar-driven gas inflow to the center. The almost abrupt weakening of the bars observed in all models is triggered either by vertical buckling (in gas-poor disks)~or by resonance heating (in gas-rich disks). The dark matter halo serves as the angular momentum sink for the stellar bar, thus compensating it for the angular momentum received from the gas.