101 citations · 870 across the 50 of their papers we have counts for
6 papers · 1 filter
Grids of stellar models with rotation: V. Models from 1.7 to 120 Msun at zero metallicity
Laura J. Murphy, Jose H. Groh, Sylvia Ekstrom +10
Understanding the nature of the first stars is key to understanding the early universe. With new facilities such as JWST we may soon have the first observations of the earliest ste…
A strong neutron burst in jet-like supernovae of spinstars
A. Choplin, N. Tominaga, B. S. Meyer
Some metal-poor stars have abundance patterns which are midway between the slow (s) and rapid (r) neutron capture processes. We show that the helium shell of a fast rotating massiv…
The R-Process Alliance: The Peculiar Chemical Abundance Pattern of RAVE J183013.5-455510
Vinicius M. Placco, Rafael M. Santucci, Zhen Yuan +14
We report on the spectroscopic analysis of RAVE J183013.5-455510, an extremely metal-poor star, highly enhanced in CNO, and with discernible contributions from the rapid neutron-ca…
Neutron-capture elements in dwarf galaxies III: A homogenized analysis of 13 dwarf spheroidal and ultra-faint galaxies
Moritz Reichert, Camilla J. Hansen, Michael Hanke +3
We present a large homogeneous set of stellar parameters and abundances across a broad range of metallicities, involving classical dwarf spheroidal (dSph) and ultra-faint dSph…
Neutron-capture elements in dwarf galaxies II: Challenges for the s- and i-processes at low metallicity
Ása Skúladóttir, Camilla Juul Hansen, Arthur Choplin +3
The slow () and intermediate () neutron () capture processes occur both in asymptotic giant branch (AGB) stars, and in massive stars. To study the build-up of the - and…
Nucleosynthesis in early rotating massive stars and chemical composition of CEMP stars
Arthur Choplin, Raphael Hirschi
The first massive stars triggered the onset of chemical evolution by releasing the first metals (elements heavier than helium) in the Universe. The nature of these stars and how th…