Back to Volume
Paper: Gas Feedback and Angular Momentum Redistribution in Barred Galaxies within Dark Matter Halos
Volume: 390, Pathways Through an Eclectic Universe
Page: 382
Authors: Berentzen, I.; Shlosman, I.; Martínez-Valpuesta, I.; Heller, C.H.
Abstract: 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.
Back to Volume