2 papers
astro-ph2008
Bimodal abundance pattern in M51: evidence for corotation resonance effects
I. A. Acharova, O. A. Galazutdinova, J. R. D. Lépine +2
A chemical evolution model for the bimodal-like abundance distribution in the external galaxy M51 recently derived on the basis of HST data for more than a half million red supergi…
astro-ph2007
Direct determination of the epicycle frequency in the galactic disk, and the derived rotation velocity V0
J. R. D. Lepine, Wilton S. Dias, Yuri Mishurov
We present a method which allows a direct measurement of the epicycle frequency in the galactic disk, using the large database on open clusters completed by our group. The obse…