Results 71 to 80 of about 42,668 (331)

From Canonical to Enhanced Extra Mixing in Low-Mass Red Giants: Tidally Locked Binaries [PDF]

, 2006
Stellar models which incorporate simple diffusion or shear induced mixing are used to describe canonical extra mixing in low mass red giants of low and solar metallicity.
Brian Chaboyer, Charbonnel C., Charbonnel C., Charbonnel C., Charbonnel C., Denissenkov P. A., Gratton R. G., Hut P., Ke Li, Maeder A., Pavel A. Denissenkov, Smith G. H., Zahn J.-P.   +12 more
core   +3 more sources

Bioinspired Polypeptide Dendrimer‐Modified Thin‐Film Composite Membranes for Selective Lithium‐Magnesium Separation with DFT Insights

Advanced Functional Materials, EarlyView.
We fabricated a biomimetic dendrimer‐modified thin‐film nanocomposite membrane with a coordination‐assisted ion‐selective interface. pH‐responsive polypeptide sites preferentially bind Mg2+ and promote Li+ permeation, as predicted by density functional theory calculations of metal‐ligand interactions.
Mehrasa Yassari, Seyedeh Fatemeh Seyedpour, Bamlak Setegne, Amir Aghaei, Behzad Ahvazi, Mostafa Dadashi Firouzjaei, Mark Elliott, Mohtada Sadrzadeh   +7 more
wiley   +1 more source

Rotation Reduces Convective Mixing in Jupiter and Other Gas Giants

The Astrophysical Journal Letters, 2023
Recent measurements of Jupiter’s gravitational moments by the Juno spacecraft and seismology of Saturn’s rings suggest that the primordial composition gradients in the deep interior of these planets have persisted since their formation.
J. R. Fuentes, Evan H. Anders, Andrew Cumming, Bradley W. Hindman   +3 more
doaj   +1 more source

The evolutionary time scale of Sakurai's object: A test of convection theory? [PDF]

, 2001
Sakurai's object (V4334 Sgr) is a born again AGB star following a very late thermal pulse. So far no stellar evolution models have been able to explain the extremely fast evolution of this star, which has taken it from the pre-white dwarf stage to its ...
Asplund M., Asplund M., Bessell M. S., Blocker T., Blocker T., Falk Herwig, Herwig F., Herwig F., Herwig F., Kerber F., Kimeswenger S., Langer N., Schonberner D.   +12 more
core   +2 more sources

The Cuttlebone Blueprint for Multifunctional Metamaterials: Design Taxonomy, Functional Decoupling, and Future Horizons

Advanced Functional Materials, EarlyView.
Cuttlebone‐inspired metamaterials exploit a septum‐wall architecture to achieve excellent mechanical and functional properties. This review classifies existing designs into direct biomimetic, honeycomb‐type, and strut‐type architectures, summarizes governing design principles, and presents a decoupled design framework for interpreting multiphysical ...
Xinwei Li, Zhendong Li
wiley   +1 more source

Fast and Slow Crystallization-driven Convection in White Dwarfs

The Astrophysical Journal
We investigate crystallization-driven convection in carbon–oxygen white dwarfs. We present a version of the mixing length theory that self-consistently includes the effects of thermal diffusion and composition gradients, and provides solutions for the ...
Matias Castro-Tapia, Andrew Cumming, J. R. Fuentes   +2 more
doaj   +1 more source

Heat Transport and Convective Velocities in Compositionally Driven Convection in Neutron Star and White Dwarf Interiors

The Astrophysical Journal, 2023
We investigate heat transport associated with compositionally driven convection driven by crystallization at the ocean–crust interface in accreting neutron stars, or growth of the solid core in cooling white dwarfs.
J. R. Fuentes, Andrew Cumming, Matias Castro-Tapia, Evan H. Anders   +3 more
doaj   +1 more source

THE SENSITIVITY OF CONVECTION ZONE DEPTH TO STELLAR ABUNDANCES: AN ABSOLUTE STELLAR ABUNDANCE SCALE FROM ASTEROSEISMOLOGY [PDF]

The Astrophysical Journal, 2012
37 pages, 12 figures, 2 tables, submitted to ApJ.
van Saders, Jennifer L., Pinsonneault, Marc H.   +1 more
openaire   +2 more sources

Turbulent Cells in Stars: I. Fluctuations in Kinetic Energy and Luminosity

, 2011
Three-dimensional (3D) hydrodynamic simulations of shell oxygen burning (Meakin and Arnett, 2007b) exhibit bursty, recurrent fluctuations in turbulent kinetic energy.
Alligood, Arnett, Arnett, Arnett, Arnett, Berger, Böhm-Vitense, Canuto, Casey Meakin, Chandrasekhar, Cvitanović, Davidson, Dutton, Frisch, Gleick, Hansen, Kadanoff, Kolmogorov, Landau, Landau, Libchaber, Lorenz, McComb, Meakin, Meakin, Meakin, Monin, Nordlund, Poincaré, Shannon, Sparrow, Stothers, Stothers, Thompson, Tritton, Unno, von Neumann, W. David Arnett, Wood, Woodward, Woodward, Woodward   +41 more
core   +1 more source

The Mass of the Convective Zone in FGK Main Sequence Stars and the Effect of Accreted Planetary Material on Apparent Metallicity Determinations [PDF]

, 2001
The mass of the outer convective zone in FGK main sequence stars decreases dramatically with stellar mass. Therefore, any contamination of a star's atmosphere by accreted planetary material should affect hotter stars much more than cool stars.
D. L. DePoy, Favata F., Gimenez A., Gonzalez G., Gonzalez G., M. Coffee, M. H. Pinsonneault, Olsen E. H., Olsen E. H., Rocha-Pinto H. J., Santos N. C.   +10 more
core   +2 more sources