198 citations · 412 across the 10 of their papers we have counts for
5 papers · 1 filter
A photometric study of the young open cluster NGC 1220
S. Ortolani, G. Carraro, S. Covino +2
We present UBV CCD observations obtained in the field of the northern open cluster NGC 1220, for which little information is available. We provide also BV CCD photometry of a field…
An optical and near IR study of the old open cluster NGC 2141
G. Carraro, S. Hassan, S. Ortolani +1
We report on CCD optical (B and V passbands) and near IR (J and K bands) observations in the region of the old open cluster NGC 2141. By combining the two sets of photometry (500 s…
Dwarf Elliptical Galaxies: Structure, Star Formation, and Color-Magnitude Diagrams
G. Carraro, C. Chiosi, L. Girardi +1
The aim of this paper is to cast light on the formation and evolution of elliptical galaxies by means of N-body/hydro-dynamical simulations that include star formation, feed-back a…
The elusive old population of the dwarf spheroidal galaxy Leo I
Enrico V. Held, Ivo Saviane, Yazan Momany +1
We report the discovery of a significant old population in the dwarf spheroidal (dSph) galaxy Leo I as a result of a wide-area search with the ESO New Technology Telescope. Studies…
On the galactic disc age-metallicity relation
G. Carraro, Y. K. Ng, L. Portinari
A comparison is made between the age-metallicity relation obtained from four different types of studies: F and G stars in the Solar Neighbourhood, analysis of open clusters, galact…