Other
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20517703m&link_type=abstract
American Astronomical Society Meeting 205, #177.03; Bulletin of the American Astronomical Society, Vol. 37, p.381
Other
Scientific paper
We have used a set of N-body simulations including stars, gas and star formation, photometrically calibrated in B and K wavebands to compare the bar length with the location of some dynamic resonances. Bar length has been determined by various observational criteria which use ellipse fitting and Fourier analysis tools. We show that it is possible to estimate the location of corotation and Ultra Harmonic Resonance (UHR or 4/1) by a careful analysis of the surface brightness distribution in face-on barred galaxies. Indeed, among five criteria, we find that the best criterion to determine the location of the corotation is the minimum of ellipticity located just outside the bulk of the bar. We also give some clues to determine the location of the UHR using two other criteria. The first one is based on the bar-interbar brightness contrast, the second one is a new criterion introduced in this work based on the results of ellipse fitting.
Michel-Dansac Leo
Wozniak Herve
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