Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Caloi, Vittoria"'
Autor:
D'Antona, Francesca, Milone, Antonino P., Johnson, Christian I., Tailo, Marco, Vesperini, Enrico, Caloi, Vittoria, Ventura, Paolo, Marino, Anna Fabiola, Dell'Agli, Flavia
We present Hubble Space Telescope (HST) photometric results for NGC 6402, a highly reddened very luminous Galactic globular cluster (GC). Recent spectroscopic observations of its red giant stars have shown a quite peculiar behavior in the chemistry o
Externí odkaz:
http://arxiv.org/abs/2201.02546
We interpret the stellar population of $\omega$ Centauri by means of a population synthesis analysis, following the most recent observational guidelines for input metallicities, helium and [(C+N+O)/Fe] contents. We deal at the same time with the main
Externí odkaz:
http://arxiv.org/abs/1602.02535
Autor:
Tailo, Marco, D'Antona, Francesca, Vesperini, Enrico, Di Criscienzo, Marcella, Ventura, Paolo, Milone, Antonino, Bellini, Andrea, Dotter, Aaron, Decressin, Thibaut, D'Ercole, Annibale, Caloi, Vittoria, Dolcetta, Roberto Capuzzo
Horizontal Branch stars belong to an advanced stage in the evolution of the oldest stellar galactic population, occurring either as field halo stars or grouped in globular clusters. The discovery of multiple populations in these clusters, that were p
Externí odkaz:
http://arxiv.org/abs/1506.07463
Core helium burning is the dominant source of energy of extreme horizontal branch stars, as the hydrogen envelope is too small to contribute to the nuclear energy output. The evolution of each mass in the HR diagram occurs along vertical tracks that,
Externí odkaz:
http://arxiv.org/abs/1003.2052
Autor:
Caloi, Vittoria, D'Antona, Francesca
Publikováno v:
Astrophys.J.673:847-853,2008
There is a growing evidence that several globular clusters must contain multiple stellar generations, differing in helium content. This hypothesis has helped to interpret peculiar unexplained features in their horizontal branches. In this framework w
Externí odkaz:
http://arxiv.org/abs/0709.1572
The majority of the inhomogeneities in the chemical composition of Globular Cluster (GC) stars appear due to primordial enrichment. The most studied model today claims that the ejecta of Asymptotic Giant Branch (AGB) stars of high mass -those evolvin
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612654
Publikováno v:
Mem.Soc.Ast.It.77:168-171,2006
Most inhomogeneities in the chemical composition of GC stars are due to primordial enrichment. The model today most credited is that the winds lost by high mass Asymptotic Giant Branch (AGB) stars, evolving during the first $\simlt$200Myr of the Clus
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510273
Autor:
D'Antona, Francesca, Caloi, Vittoria
Publikováno v:
Astrophys.J.611:871-880,2004
Enhancement and spread of helium among globular cluster stars have been recently suggested as a way to explain the horizontal branch blue tails, in those clusters which show a primordial spread in the abundances of CNO and other elements involved in
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405016
Autor:
D'Antona, Francesca1, Caloi, Vittoria2
Publikováno v:
Proceedings of the International Astronomical Union. 09/02/2007, Vol. 3 Issue S246, p156-160. 5p.
Autor:
D'Antona, Francesca1 (AUTHOR) dantona@oa-roma.inaf.it, Caloi, Vittoria2 (AUTHOR) vittoria.caloi@iasf-roma.inaf.it
Publikováno v:
Proceedings of the International Astronomical Union. 9/2/2006, Vol. 3 Issue S246, p156-160. 5p.