Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Primas, Francesca"'
Autor:
Jerabkova, Tereza, Patat, Ferdinando, Primas, Francesca, Dorigo, Dario, Sogni, Fabio, Astolfi, Lucas, Bierwirth, Thomas, Pruemm, Michael
The European Southern Observatory (ESO) implemented a new paradigm called Distributed Peer Review (DPR) as part of its proposal evaluation process in Period 110. Under DPR, Principal Investigators who submit proposals agree to review a certain number
Externí odkaz:
http://arxiv.org/abs/2305.09277
Autor:
Aoki, Misa, Primas, Francesca, Pasquini, Luca, Weiss, Achim, Salaris, Maurizio, Carollo, Daniela
Our aim was to determine the initial Li content of two clusters of similar metallicity but very different ages, the old open cluster NGC 2243 and the metal-rich globular cluster NGC 104. We compared the lithium abundances derived for a large sample o
Externí odkaz:
http://arxiv.org/abs/2106.15441
Autor:
Carollo, Daniela, Chiba, Masashi, Ishigaki, Miho, Freeman, Ken, Beers, Timothy C., Lee, Young Sun, Tissera, Patricia, Battistini, Chiara, Primas, Francesca
The Milky Way is a unique laboratory, where stellar properties can be measured and analyzed in detail. In particular, stars in the older populations encode information on the mechanisms that led to the formation of our Galaxy. In this article, we ana
Externí odkaz:
http://arxiv.org/abs/1904.04881
Autor:
Hill, Vanessa, Skúladóttir, Ása, Tolstoy, Eline, Venn, Kim A., Shetrone, Matthew D., Jablonka, Pascale, Primas, Francesca, Battaglia, Giuseppina, de Boer, Thomas J. L., François, Patrick, Helmi, Amina, Kaufer, Andreas, Letarte, Bruno, Starkenburg, Else, Spite, Monique
Publikováno v:
A&A 626, A15 (2019)
We present detailed chemical abundances for 99 red-giant branch stars in the centre of the Sculptor dwarf spheroidal galaxy, obtained from high-resolution VLT/FLAMES spectroscopy. This includes abundances of Li (detected in 1 out of 99 stars), Na, $\
Externí odkaz:
http://arxiv.org/abs/1812.01486
Autor:
Gruyters, Pieter, Lind, Karin, Richard, Olivier, Grundahl, Frank, Asplund, Martin, Casagrande, Luca, Charbonnel, Corinne, Milone, Antonino, Primas, Francesca, Korn, Andreas J.
Publikováno v:
A&A 589, A61 (2016)
The prediction of the PLANCK-constrained primordial lithium abundance in the Universe is in discordance with the observed Li abundances in warm Population II dwarf and subgiant stars. Among the physically best motivated ideas, it has been suggested t
Externí odkaz:
http://arxiv.org/abs/1603.01565
Publikováno v:
Astronomy & Astrophysics, 2014, Volume 569, L6
Several models compete to explain the abundance properties of stellar populations in globular clusters. One of the main constraints is the present-day ratio of first- and second-generation stars that are currently identified based on their sodium con
Externí odkaz:
http://arxiv.org/abs/1410.3967
Autor:
Hansen, Camilla Juul, Primas, Francesca, Hartman, Henrik, Kratz, Karl-Ludwig, Wanajo, Shinya, Leibundgut, Bruno, Farouqi, Khalil, Hallmann, Oliver, Christlieb, Norbert, Nilsson, Hampus
Publikováno v:
A&A 545, A31, 2012
The rapid neutron-capture process, creating about half of the heaviest elements in the Solar System was believed to be unique. Many recent studies have shown that this does not include the formation of lighter elements (in particular 38 < Z < 48). Am
Externí odkaz:
http://arxiv.org/abs/1205.4744
Autor:
Venn, Kim, Shetrone, Matthew, Irwin, Mike, Hill, Vanessa, Jablonka, Pascale, Tolstoy, Eline, Lemasle, Bertrand, Divell, Mike, Starkenburg, Else, Letarte, Bruno, Baldner, Charles, Battaglia, Giuseppina, Helmi, Amina, Kaufer, Andreas, Primas, Francesca
The detailed abundances of 23 elements in nine bright RGB stars in the Carina dSph are presented based on high resolution spectra gathered at the VLT and Magellan telescopes. A spherical model atmospheres analysis is applied using standard methods to
Externí odkaz:
http://arxiv.org/abs/1204.0787
Publikováno v:
Astrophys.J.644:229-259,2006
Very high-quality spectra of 24 metal-poor halo dwarfs and subgiants have been acquired with ESO's VLT/UVES for the purpose of determining Li isotopic abundances. The derived 1D, non-LTE 7Li abundances from the LiI 670.8nm line reveal a pronounced de
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510636
Autor:
Cowan, John J., Sneden, Christopher, Beers, Timothy C., Lawler, James E., Simmerer, Jennifer, Truran, James W., Primas, Francesca, Collier, Jason, Burles, Scott
Publikováno v:
Astrophys.J. 627 (2005) 238-250
We present new abundance determinations of neutron-capture elements Ge, Zr, Os, Ir, and Pt in a sample of 11 metal-poor (-3.1 <= [Fe/H] <= -1.6) Galactic halo giant stars, based on Hubble Space Telescope UV and Keck I optical high-resolution spectros
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502591