Hydrodynamical instabilities induced by atomic diffusion in A stars and their consequences

2016/03/22 by Morgan Deal, M. Deal, O. Richard +3 · 36 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Atomic diffusion #Diffusion #Radiative transfer #Stars #Stellar atmosphere #Stellar evolution #Stellar structure #Stellar, planetary, and galactic studies #Surface (topology) #astro-ph.SR

paper · pdf · doi:10.1051/0004-6361/201628180

published in Astronomy and Astrophysics 589, A140 (EDP Sciences) · 7 pages, 7 figures, accepted in A&A

openalex publication_date 2016/03/22 · arxiv created 2016/04/05 · arxiv updated 2016/04/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Aims. Atomic diffusion, including the effect of radiative accelerations on individual elements, leads to important variations of the chemical composition inside the stars. The accumulation in specific layers of the elements, which are the main contributors of the local opacity, leads to hydrodynamical instabilities that modify the internal stellar structure and surface abundances. Our aim is to study these effects and compare the resulting surface abundances with spectroscopic observations

Citations

• Thermohaline mixing and gravitational settling in carbon-enhanced metal-poor stars

Cited by

• An improved parametric method for evaluating radiative accelerations in stellar interiors
• Asteroseismic Modeling of Gravity Modes in Slowly Rotating A/F Stars with Radiative Levitation