Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Eugenio Carretta"'
Autor:
Eugenio Carretta
Among the multiple stellar populations in globular clusters (GCs) the very high-temperature H-burning regime, able to produce elements up to potassium, is still poorly explored. Here we present the first abundance analysis of K in 42 giants of NGC 67
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e7b7ac67716350ded20d83624d4bbb0
http://arxiv.org/abs/2209.06220
http://arxiv.org/abs/2209.06220
Autor:
Eugenio Carretta
NGC 4833 is a metal-poor Galactic globular cluster (GC) whose multiple stellar populations present an extreme chemical composition. The Na-O anti-correlation is quite extended, which is in agreement with the long tail on the blue horizontal branch, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3aeb899300bb685192ac3e698fa4c51
Autor:
Angela Bragaglia, Eugenio Carretta
NGC 6388 is one of the most massive Galactic globular clusters (GC) and it is an old, metal-rich, Galactic bulge cluster. By exploiting previous spectroscopic observations we were able to bypass the uncertainties in membership related to the strong f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a9e8ae2eca5eb20e5f0febb71745a4c
Autor:
Eugenio Carretta, Angela Bragaglia
Multiple stellar populations in globular clusters (GCs) are distinct by their different abundances of light elements. The abundance anti-correlations point towards a nucleosynthesis origin due to high-temperature H burning, but it remains to be asses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a80f1a44899151c70eaf98c1cccadb2a
Autor:
Eugenio Carretta, Angela Bragaglia
Publikováno v:
Astronomy & Astrophysics. 660:L1
Chemical tagging of globular clusters (GCs) is often done using abundances of alpha-elements. The iron-peak elements Sc, V, and in particular Zn were proposed as an alternative to alpha-elements to tag accreted GCs in the metal-rich regime, where the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0406779b5551ed5a5aaa262c780417ad
https://doi.org/10.1051/0004-6361/202243211
https://doi.org/10.1051/0004-6361/202243211
Autor:
Angela Bragaglia, Valentina D'Orazi, Sara Lucatello, Raffaele Gratton, Antonio Sollima, Eugenio Carretta
Publikováno v:
The Astronomy and Astrophysics Review. 27
Globular clusters are large and dense agglomerate of stars. At variance with smaller clusters of stars, they exhibit signs of some chemical evolution. At least for this reason, they are intermediate between open clusters and massive objects such as n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56cecf796c25d4cc82b4e930ee475669
https://doi.org/10.1007/s00159-019-0119-3
https://doi.org/10.1007/s00159-019-0119-3
Autor:
Eugenio Carretta
Large star-to-star abundance variations are direct evidence of multiple stellar populations in Galactic globular clusters (GCs). The main and most widespread chemical signature is the anti-correlation of the stellar Na and O abundances. The interquar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7b46fe245c64c2cb7b5257b57878807
http://arxiv.org/abs/1903.04494
http://arxiv.org/abs/1903.04494
Autor:
Angela Bragaglia, Eugenio Carretta
The metal-rich and old bulge globular cluster (GC) NGC 6388 is one of the most massive Galactic GCs (M ~ 10^6 Msun). However, the spectroscopic properties of its multiple stellar populations rested only on 32 red giants (only seven of which observed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7032ad9bc67db63dc33ba50df59070c6
Autor:
Antonio Sollima, Raffaele Gratton, Angela Bragaglia, Sara Lucatello, Valentina D'Orazi, Eugenio Carretta
We observed a sample of 90 red giant branch (RGB) stars in NGC 2808 using FLAMES/GIRAFFE and the high resolution grating with the set up HR21. These stars have previous accurate atmospheric parameters and abundances of light elements. We derived alum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b06f6bbdceb91433a18ad79ec995713a
http://hdl.handle.net/20.500.12386/27831
http://hdl.handle.net/20.500.12386/27831
Autor:
Eugenio Carretta, Angela Bragaglia
Publikováno v:
Proceedings of the International Astronomical Union. 14:267-268
Recently, the sample size of stars with detailed, homogeneous abundances in the massive bulge Globular cluster NGC 6388 expanded to 185 giants. We use this wealth of data to present first results on its multiple stellar populations. In particular, i)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c6ca4a2fde1f27f93431e06a0ca4023
https://doi.org/10.1017/s1743921319006677
https://doi.org/10.1017/s1743921319006677