EDP Sciences
Free access
Volume 440, Number 2, September III 2005
Page(s) 473 - 476
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361:20053184

A&A 440, 473-476 (2005)
DOI: 10.1051/0004-6361:20053184

Research Note

Theoretical color-magnitude diagrams and the star forming histories of interacting open multi-population model galaxies: bursts and busts

G. 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
    e-mail: shore@df.unipi.it

(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

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