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7 papers · 2 filters
Chemical Evolution of R-process Elements in Stars (CERES): IV. An observational run-up of the third r-process peak with Hf, Os, Ir, and Pt
Arthur Alencastro Puls, Jan Kuske, Camilla Juul Hansen +8
The third r-process peak (Os, Ir, Pt) is poorly understood due to observational challenges, with spectral lines located in the blue or near-ultraviolet region of stellar spectra. T…
Gaia Data Release 3: spectroscopic binary-star orbital solutions. The SB1 processing chain
E. Gosset, Y. Damerdji, T. Morel +7
Gaia is an astrometric space experiment that is measuring positions, proper motions as well as parallaxes for a huge number of stars. It operates a medium-dispersion spectrometer,…
Binary progenitor systems for Type Ic supernovae
Martín Solar, Michał J. Michałowski, Jakub Nadolny +18
Core-collapse supernovae are explosions of massive stars at the end of their evolution. They are responsible for metal production and for halting star formation, having a significa…
Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost
A. Khalatyan, F. Anders, C. Chiappini +14
In this paper, we explore the feasibility of using machine learning regression as a method of extracting basic stellar parameters and line-of-sight extinctions from spectro-photome…
The true nature of HE0057-5959, the most metal-poor Li-rich star
A. Mucciarelli, P. Bonifacio, L. Monaco +2
The Li-rich stars are a class of rare objects with A(Li) higher than that of other stars in the same evolutionary stage. Their origin is still debated and valuable routes are the C…
Neutron-capture elements in a sample of field metal-poor N-rich dwarfs
M Spite, P Bonifacio, E Caffau +1
The aim of this work is to measure the abundances of n-capture elements in a sample of six metal-poor N-rich dwarfs that were formed in globular clusters, and subsequently became u…