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In this paper we investigate the effects of element diffusion on the structure and evolution of low-mass helium white dwarfs. Attention is focused mainly on the occurrence of hydrogen shell flashes induced by diffusion p...

The purpose of this work is to explore the evolution of helium-core white dwarf stars in a self-consistent way with the predictions of detailed non-grey model atmospheres and element diffusion. To this end, we consider h...

The aim of this work is to investigate the effect of element diffusion on the evolution of helium white dwarfs. To this end, we couple the multicomponent flow equations that describe gravitational settling, chemical and...

Materias / palabras clave: Anisotropy; Geophysics; Geology; Earth model; Mantle (geology); Isotropy; Geodesy; Structure of the Earth; Transverse isotropy; Earth structure; Outer core; Seismic anisotropy

Materias / palabras clave: Continental crust; Geology; Crust; Composition (language); Earth science; Geochemistry; Philosophy; Linguistics

Ecological changes in the phenology and distribution of plants and animals are occurring in all well-studied marine, freshwater, and terrestrial groups. These observed changes are heavily biased in the directions predict...