Slow neutron-capture process: low-mass asymptotic giant branch stars and presolar silicon carbide grains
Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of
ancient stars that died before the formation of the solar system. The majority (~ 90% in …
ancient stars that died before the formation of the solar system. The majority (~ 90% in …
Presolar grain isotopic ratios as constraints to nuclear and stellar parameters of asymptotic giant branch star nucleosynthesis
Recent models for evolved low-mass stars (with M≲ 3 M⊙), undergoing the asymptotic giant
branch (AGB) phase assume that magnetic flux-tube buoyancy drives the formation of 13 C …
branch (AGB) phase assume that magnetic flux-tube buoyancy drives the formation of 13 C …
Magnetic-buoyancy-induced mixing in AGB stars: A theoretical explanation of the non-universal relation of [Y/Mg] to age
Context. Abundance ratios involving Y or other slow-neutron capture elements are routinely
used to infer stellar ages. Aims. We aim to explain the observed [Y/H] and [Y/Mg] abundance …
used to infer stellar ages. Aims. We aim to explain the observed [Y/H] and [Y/Mg] abundance …
Galactic Chemical Evolution of Radioactive Isotopes with an s-process Contribution
TCL Trueman, B Côté, AY López… - The Astrophysical …, 2022 - iopscience.iop.org
Abstract Analysis of inclusions in primitive meteorites reveals that several short-lived
radionuclides (SLRs) with half-lives of 0.1–100 Myr existed in the early solar system (ESS) …
radionuclides (SLRs) with half-lives of 0.1–100 Myr existed in the early solar system (ESS) …
Single-photon ionization of SiC in the gas phase: experimental and ab initio characterization of SiC+
We report the first experimental observation of single-photon ionization transitions of the SiC
radical between 8.0 and 11.0 eV performed on the DESIRS beamline at the SOLEIL …
radical between 8.0 and 11.0 eV performed on the DESIRS beamline at the SOLEIL …
Mixing and magnetic fields in asymptotic giant branch stars in the framework of FRUITY models
D Vescovi - Universe, 2021 - mdpi.com
In the last few years, the modeling of asymptotic giant branch (AGB) stars has been much
investigated, both focusing on nucleosynthesis and stellar evolution aspects. Recent …
investigated, both focusing on nucleosynthesis and stellar evolution aspects. Recent …
Cluster analysis of presolar silicon carbide grains: Evaluation of their classification and astrophysical implications
Cluster analysis of presolar silicon carbide grains based on literature data for 12 C/13 C, 14
N/15 N, δ 30 Si/28 Si, and δ 29 Si/28 Si including or not inferred initial 26 Al/27 Al data …
N/15 N, δ 30 Si/28 Si, and δ 29 Si/28 Si including or not inferred initial 26 Al/27 Al data …
[HTML][HTML] High precision nickel isotope measurements of early Solar System materials and the origin of nucleosynthetic disk variability
Various chemical elements including nickel (Ni) exhibit mass-independent isotope
heterogeneity on a bulk meteorite level, which is generally accepted to reflect the …
heterogeneity on a bulk meteorite level, which is generally accepted to reflect the …
Evaluation of the classification of pre-solar silicon carbide grains using consensus clustering with resampling methods: An assessment of the confidence of grain …
We report the use of several cluster analysis techniques to evaluate the classification of pre-
solar silicon carbide (SiC) grains. The stability of clusters and the confidence of individual …
solar silicon carbide (SiC) grains. The stability of clusters and the confidence of individual …
Where have all the interstellar silicon carbides gone?
The detection of the 11.3 emission feature characteristic of the Si–C stretch in carbon-rich
evolved stars reveals that silicon carbide (SiC) dust grains are condensed in the outflows of …
evolved stars reveals that silicon carbide (SiC) dust grains are condensed in the outflows of …