A&A 440, 473-476 (2005)
Theoretical color-magnitude diagrams and the star forming histories of interacting open multi-population model galaxies: bursts and bustsG. Valle1, M. Cignoni1 and S. N. Shore1, 2
1 Dipartimento di Fisica "Enrico Fermi", Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
2 INFN - Sezione di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
(Received 4 April 2005 / Accepted 13 June 2005)
This note presents theoretical color-magnitude diagrams (CMDs) and metallicity evolution for Galactic multipopulation models coupled to stellar evolution models for systems undergoing stripping and re-accretion of ambient material, called "open" systems in our recent studies (Valle et al. 2005, A&A, 435, 551). We show that the observables for such systems, in particular those related to the recovered star formation as a function of time, are ambiguous - systems with non-monotonic star formation rates can appear as either bursting systems or galaxies with a hiatus in the star formation.
Key words: galaxies: evolution -- galaxies: interactions
© ESO 2005