| Issue |
EAS Publications Series
Volume 24, 2007
CRAL-2006. Chemodynamics: From First Stars to Local Galaxies
|
|
|---|---|---|
| Page(s) | 51 - 56 | |
| DOI | https://doi.org/10.1051/eas:2007057 | |
| Published online | 21 April 2007 | |
E. Emsellem, H. Wozniak, G. Massacrier, J.-F. Gonzalez, J. Devriendt and N. Champavert (eds)
EAS Publications Series, 24 (2007) 51-56
Chemodynamical models of barred galaxies
1
Université de Lyon 1, Centre de
Recherche Astronomique de Lyon, Lyon, France
2
Instituto de Astronomia, Ensenada,
UNAM, Mexico
Corresponding authors: herve.wozniak@obs.univ-lyon1.fr ; leo@astrosen.unam.mx
The use of chemodynamical simulations of disc galaxies calibrated in B
and K bands allows us to compare the location of Ultra Harmonic
Resonance (UHR) and corotation (CR) with photometrically estimated bar
lengths. We apply several observational criteria to determine bar
lengths. We show that the minimum of ellipticity located just outside
the bulk of the bar is correlated with CR whereas the location of UHR
can be approximated using the end of the position-angle plateau of bar
isophotes. We give evidence that the classification of slow/fast
bars, based on the ratio 
= RCR/Rbar
could increase from 1 (fast bar) to 1.4 (slow bar) just by a change of
method.
© EAS, EDP Sciences, 2007