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Theoretical expectations for clump red giants as distance indicators
Leo Girardi
Variations of ~0.4 mag are expected in the I-band absolute magnitude of red clump giants, M_I^RC, as a function of both stellar age and metallicity. This regardless of some potenti…
Population effects on the Red Giant Clump absolute magnitude, and distance determinations to nearby galaxies
Leo Girardi, Maurizio Salaris
(Abridged) The red giant clump has been recently argued to be a reliable distance indicator for the galaxies in the Local Group. We re-address the problem of the systematic magnitu…
Broad-band colour evolution of star clusters
Leo Girardi
We briefly review the main features in the broad-band colour evolution of star clusters, over the complete age interval from 10^7 to 10^(10) yr. The emphasis is in the problem of a…
On the peculiar red clump morphology in the open clusters NGC 752 and NGC 7789
L. Girardi, J. -C. Mermilliod, G. Carraro
The red clump stars in the open cluster NGC 752 present a peculiar distribution in the colour-magnitude diagran (CMD): the clump is observed to present a faint extension, slightly…