75 citations · 164 across the 4 of their papers we have counts for
4 papers
The double main sequence of Omega Centauri
L. R. Bedin, G. Piotto, J. Anderson +4
Recent, high precision photometry of Omega Centauri, the biggest Galactic globular cluster, has been obtained with Hubble Space Telescope. The color magnitude diagram reveals an un…
Models for extremely metal-poor halo stars
A. Weiss, H. Schlattl, M. Salaris +2
Two alternative scenarios concerning the origin and evolution of extremely metal-poor halo stars are investigated. The first one assumes that the stars have been completely metal-f…
A study of the s-process in the carbon-rich post-AGB stars IRAS06530-0213 and IRAS08143-4406 on the basis of VLT-UVES spectra
Maarten Reyniers, Hans Van Winckel, Roberto Gallino +1
In an effort to extend the still limited sample of s-process enriched post-AGB stars, high-resolution, high signal-to-noise VLT+UVES spectra of the optical counterparts of the infr…
Why Hot Horizontal Branch Stars Can Appear Redder Than Red Giants
Y. Momany, S. Cassisi, G. Piotto +4
In this paper we report on a curious feature in the V, (U-B) color-magnitude diagrams of globular clusters. In our database, we find that a considerable fraction of blue horizontal…