Pattern Speeds in Barred Galaxies
نویسندگان
چکیده
منابع مشابه
Multiple pattern speeds in barred galaxies I. Two-dimensional models
We have studied the coexistence of several modes with different pattern speeds in barred galaxies, by a simulation survey exploring a wide range of initial conditions. The high resolution two-dimensional experiments cover the dynamical evolution for about one Hubble time. A remarkable feature of these simulations is that in many cases the spiral structure is clearly visible in the stellar compo...
متن کاملBarred Galaxies
Theoretical studies suggest that large-scale stellar bars can be highly effective in delivering gas to the central few hundred parsecs of a spiral galaxy, which may then initiate rapid star formation. Further instabilities may lead to additional inflow to physical scales relevant for active galactic nuclei. We test these predictions in light of recent observations. Compared to unbarred spirals,...
متن کاملResonances in Barred Galaxies
The inner parts of many spiral galaxies are dominated by bars. These are strong nonaxisymmetric features which significantly affect orbits of stars and dark matter particles. One of the main effects is the dynamical resonances between galactic material and the bar. We detect and characterize these resonances in N-body models of barred galaxies by measuring angular and radial frequencies of indi...
متن کاملModel-based pattern speed estimates for 38 barred galaxies
We have modelled 38 barred galaxies by using near-IR and optical data from the Ohio State University Bright Spiral Galaxy Survey. We constructed the gravitational potentials of the galaxies from H-band photometry, assuming constant mass-to-light ratio. The halo component we chose corresponds to the so called universal rotation curve. In each case, we used the response of gaseous and stellar par...
متن کاملGas flow in barred galaxies
I briefly review the properties of the gas flow in and around the region of the bar in a disc galaxy and discuss the corresponding inflow and the loci of star formation. I then review the flow of gas in barred galaxies which have an additional secondary bar. Finally I discuss the signatures of bars in edge-on galaxies.
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1996
ISSN: 0252-9211
DOI: 10.1017/s0252921100049721