Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Caloi, V."'
Autor:
D'Antona, F., Vesperini, E., Calura, F., Ventura, P., D'Ercole, A., Caloi, V., Marino, A. F., Milone, A. P., Dell'Agli, F., Tailo, M.
We explore the possibility that the N-rich young proto-galaxy GN-z11 recently observed at z=10.6 by the James Webb Space Telescope is the result of the formation of second generation stars from pristine gas and Asymptotic Giant Branch (AGB) ejecta in
Externí odkaz:
http://arxiv.org/abs/2311.14558
Autor:
Tailo, M., Milone, A. P., Lagioia, E. P., D'Antona, F., Jang, S., Vesperini, E., Marino, A. F., Ventura, P., Caloi, V., Carlos, M., Cordoni, G., Dondoglio, E., Mohandasan, A., Nastasio, J. E., Legnardi, M. V.
The amount of mass lost by stars during the red-giant branch (RGB) phase is one of the main parameters to understand and correctly model the late stages of stellar evolution. Nevertheless, a fully-comprehensive knowledge of the RGB mass loss is still
Externí odkaz:
http://arxiv.org/abs/2102.12146
Autor:
Tailo, M., Milone, A. P., Lagioia, E. P., D'Antona, F., Marino, A. F., Vesperini, E., Caloi, V., Ventura, P., Dondoglio, E., Cordoni, G.
The location of Galactic Globular Clusters' (GC) stars on the horizontal branch (HB) should mainly depend on GC metallicity, the "first parameter", but it is actually the result of complex interactions between the red giant branch (RGB) mass loss, th
Externí odkaz:
http://arxiv.org/abs/2009.01080
The study of the "chromosome maps" of Galactic Globular Clusters has shown that the stars identified as `first generation' often define an extended sequence in the $m_{F275W}-m_{F814W}$ colour, whose straightforward interpretation, by comparison with
Externí odkaz:
http://arxiv.org/abs/1905.02584
Autor:
D'Antona, F., Caloi, V., D'Ercole, A., Tailo, M., Vesperini, E., Ventura, P., Di Criscienzo, M.
We examine the photometric data for Fornax clusters, focussing our attention on their horizontal branch color distribution and, when available, on the RR Lyr variables fraction and period distribution. Based on our understanding of the HB morphology
Externí odkaz:
http://arxiv.org/abs/1306.3351
Autor:
Caloi, V., D'Antona, F.
Most Globular Clusters so far examined host (at least) two stellar populations. This feature requires a two--step process, in which the nuclearly processed matter from a first generation (FG) of stars gives birth to a second generation (SG) bearing t
Externí odkaz:
http://arxiv.org/abs/1106.0810
Autor:
Di Criscienzo, M., D'Antona, F., Milone, A. P., Ventura, P., Caloi, V., Carini, R., D'Ercole, Vesperini, E., Piotto, G.
We analyse complementary HST and SUBARU data for the globular cluster NGC 2419. We make a detailed analysis of the horizontal branch (HB), that appears composed by two main groups of stars: the luminous blue HB stars ---that extend by evolution into
Externí odkaz:
http://arxiv.org/abs/1103.0867
Autor:
D'Antona, F., Ventura, P., Caloi, V., D'Ercole, A., Vesperini, E., Carini, R., Di Criscienzo, M.
We consider the horizontal branch (HB) of the Globular Cluster Terzan 5, recently shown to be split into two parts, the fainter one (delta M_K ~ 0.3mag) having a lower metallicity than the more luminous. Both features show that it contains at least t
Externí odkaz:
http://arxiv.org/abs/1004.3426
The color magnitude diagram (CMD) of NGC 1851 presents two subgiant branches (SGB), probably due the presence of two populations differing in total CNO content. We test the idea that a difference in total CNO may simulate an age difference when compa
Externí odkaz:
http://arxiv.org/abs/0908.1650
Among the newly discovered features of multiple stellar populations in Globular Clusters, the cluster NGC 1851 harbours a double subgiant branch, that can be explained in terms of two stellar generations, only slightly differing in age, the younger o
Externí odkaz:
http://arxiv.org/abs/0907.1765