136 citations · 173 across the 15 of their papers we have counts for
16 papers
The Pristine survey XXIX. Data Release 2: Photometric metallicities for 15 millions stars down to
Zhen Yuan, Anke Ardern-Arentsen, Nicolas F. Martin +15
Tailored narrow-band photometric observations are an efficient way to measure the metallicity of Milky Way stars. The Pristine survey has been mapping the northern sky since 2015 u…
Abundances of CNO in candidate young metal-poor stars
Piercarlo Bonifacio, Elisabetta Caffau, Luca Sbordone +6
In this contribution we investigate the CNO abundances in five apparently young evolved stars, with the aim of discriminating between truly young stars and stars that were rejuvena…
The WEAVE-TwiLight-Survey: Expanding WEAVE's Reach to Bright and Low-Surface-Density Targets with a Novel Observing Mode
Thomas Hajnik, Nicholas A. Walton, Giuseppe D'Ago +28
Current-day multi-object spectroscopic surveys are often limited in their ability to observe bright stars due to their low surface densities, resulting in increased observational o…
The Gaia RVS Benchmark Stars. III . Confirmed and New High Radial Velocity Stars From Gaia DR3
Elisabetta Caffau, David Katz, Piercarlo Bonifacio +12
High-velocity stars are interesting targets to unveil the formation of the Milky Way. In fact they can be recently accreted from an infalling dwarf galaxies or they can be the resu…
Detailed Chemical Abundance Analysis of Metal-Poor Turn-Off Stars: One with [Fe/H] < -4 and Three with [Fe/H] < -3
Takuma Suda, Patrick Francois, Shinya Wanajo +3
We present the analysis of four new extremely metal poor turn-off stars thanks to high-resolution spectra obtained with the Subaru/HDS spectrograph. We determined the abundances an…
The most metal poor stars
P. Bonifacio, E. Caffau, P. François +1
The most metal-poor stars found in the Galaxy and in nearby galaxies are witnesses of the early evolution of the Universe. In a general picture in which we expect the metallicity t…
Young stars discovered in dwarf spheroidal galaxies confirm their recent infall into the Milky way
Francois Hammer, Piercarlo Bonifacio, Elisabetta Caffau +10
Recent observations from the ESA Gaia satellite and with the ESO VLT, have identified the presence of a population of young, 0.5 to 2 Gyr old, stars in the halo and in dwarf sphero…
The accretion history of the Milky Way IV. Hints of recent star formation in Milky Way dwarf spheroidal galaxies
Yanbin Yang, Elisabetta Caffau, Piercarlo Bonifacio +3
Dwarf spheroidal galaxies are known to be dominated by old stellar populations. This has led to the assumption that their gas-rich progenitors lost their gas during their infall in…
The accretion history of the Milky Way. II. Internal kinematics of globular clusters and of dwarf galaxies
Francois Hammer, Jianling Wang, Gary A. Mamon +7
We study how structural properties of globular clusters and dwarf galaxies are linked to their orbits in the Milky Way halo. From the inner to the outer halo, orbital energy increa…
Extremely metal-poor stars: the need for UV spectra
P. Bonifacio, E. Caffau, M. Spite
Our current understanding of the chemical evolution of the Universe is that a first generation of stars was formed out of primordial material, completely devoid of metals (Pop III…
The Pristine survey II: a sample of bright stars observed with FEROS
E. Caffau, P. Bonifacio, E. Starkenburg +8
Extremely metal-poor (EMP) stars are old objects formed in the first Gyr of the Universe. They are rare and, to select them, the most successful strategy has been to build on large…
Tracing differential reddening with Diffuse Interstellar Bands. The globular cluster M 4 as a testbed
A. Monreal-Ibero, R. Lallement, L. Puspitarini +2
Diffuse interstellar bands (DIBs) are weak absorption features of interstellar origin present in the optical and infrared spectra of stars. Their use as a tool to trace the structu…
SPADES: a Stellar PArameters DEtermination Software
Helene Posbic, David Katz, Elisabetta Caffau +4
With the large amounts of spectroscopic data available today and the very large surveys to come (e.g. Gaia), the need for automatic data analysis software is unquestionable. We thu…
The lithium content of the globular cluster NGC 6397
P. Bonifacio, L. Pasquini, F. Spite +16
We make use of high resolution, high signal-to-noise ratio spectra of 12 turn-off stars in the metal-poor globular cluster NGC 6397 to measure its lithium content. We conclude that…
HD 174005: another binary classified as lambda Boo
R. Faraggiana, M. Gerbaldi, P. Bonifacio
We demonstrate that HD 174005, a star recently classified as belonging to the lambda Boo group, is in reality a double lined spectroscopic binary; at some phases, the observed comp…
The 1999 outburst of the eclipsing and recurrent nova U Scorpii
U. Munari, T. Tomov, L. Tomasella +6
The spectroscopic and photometric evolution of the 1999 outburst of the eclipsing and recurrent nova U Sco is presented. The photometric evolution closely matches that of the previ…