Results 51 to 60 of about 17,712 (190)

Turbulent Convection in Stellar Interiors. II. The Velocity Field

, 2008
We analyze stellar convection with the aid of 3D hydrodynamic simulations, introducing the turbulent cascade into our theoretical analysis. We devise closures of the Reynolds-decomposed mean field equations by simple physical modeling of the simulations (
Arnett, Asida, Balbus, Batchelor, Bethe, Biermann, Boris, Brandenburg, Browning, Browning, Böhm-Vitense, Böhm-Vitense, Campbell, Casey Meakin, Chandrasekhar, Chandrasekhar, Charbonnel, Clayton, Cvitanović, David Arnett, Dutton, Frisch, Gill, Gleick, Hansen, Heger, Howe, Kippenhahn, Kolmogorov, Kritsuk, Landau, Ludwig, Meakin, Meakin, Meakin, Meynet, Nordlund, Oran, Patrick A. Young, Porter, Porter, Shannon, Stone, Sytine, Tassoul, Tennekes, Thompson, Timmes, Trampedach, Tritton, Turner, Vitense, Woodward, Woodward, Young, Zel'dovich   +55 more
core   +1 more source

Distillation of 56Fe in Ultramassive O–Ne White Dwarfs

The Astrophysical Journal, 2023
When white dwarfs freeze, the plasma mixtures inside them undergo separation processes that can produce radical changes in the composition profile of the star.
Matthew E. Caplan, Simon Blouin, Ian F. Freeman   +2 more
doaj   +1 more source

Neutron star cooling: Theoretical aspects and observational constraints

, 2003
The cooling theory of isolated neutron stars is reviewed. The main cooling regulators are discussed, first of all, operation of direct Urca process (or similar processes in exotic phases of dense matter) and superfluidity in stellar interiors.
A.D Kaminker, A.Y Potekhin, Arendt, Brown, Campana, Chen, Colpi, D.G Yakovlev, Flowers, Gnedin, Gudmundsson, Haensel, Halpern, K.P Levenfish, Kaminker, Kaminker, Lattimer, Lattimer, Lattimer, Lombardo, Lyne, O.Y Gnedin, Page, Page, Page, Pavlov, Pavlov, Pavlov, Pethick, Pons, Possenti, Potekhin, Potekhin, Prakash, Rutledge, Rutledge, Rutledge, Slane, Tennant, Thorne, Tsuruta, Walter, Wijnands, Winkler, Yakovlev, Yakovlev, Yakovlev, Yakovlev, Yakovlev, Yakovlev, Zavlin, Zavlin   +51 more
core   +2 more sources

The Impact of Breathing Pulses during Core Helium Burning on the Core Chemical Structure and Pulsations of Hydrogen-rich Atmosphere White Dwarfs

The Astrophysical Journal
Breathing pulses are mixing episodes that could develop during the core helium-burning phase of low- and intermediate-mass stars. The occurrence of breathing pulses is expected to bear consequences on the formation and evolution of white dwarfs ...
Alejandro H. Córsico, Leandro G. Althaus   +1 more
doaj   +1 more source

Stable magnetic fields in stellar interiors [PDF]

Astronomy & Astrophysics, 2006
19 pages, 24 figures, submitted to A& ...
Braitwaite, J., Nordlund, Å.
openaire   +3 more sources

Impact of Newly Measured Nuclear Reaction Rates on ²⁶Al Ejected Yields from Massive Stars

Universe
Over the last three years, the rates of all the main nuclear reactions involving the destruction and production of 26Al in stars (26Al(n, p)26Mg, 26Al(n, α)23Na, 26Al(p, γ)27Si and 25Mg(p, γ)26Al) have been re-evaluated thanks to new high-precision ...
Umberto Battino, Lorenzo Roberti, Thomas V. Lawson, Alison M. Laird, Lewis Todd   +4 more
doaj   +1 more source

Magnetism, dynamo action and the solar-stellar connection

Living Reviews in Solar Physics, 2017
The Sun and other stars are magnetic: magnetism pervades their interiors and affects their evolution in a variety of ways. In the Sun, both the fields themselves and their influence on other phenomena can be uncovered in exquisite detail, but these ...
Allan Sacha Brun, Matthew K. Browning
doaj   +1 more source

Influence of $f(R)$ Models on the Existence of Anisotropic Self-Gravitating Systems

, 2017
This paper aims to explore some realistic configurations of anisotropic spherical structures in the background of metric $f(R)$ gravity, where $R$ is the Ricci scalar. The solutions obtained by Krori and Barua are used to examine the nature of particular
Bhatti, M. Z., Ilyas, M., Sharif, M., Yousaf, Z.   +3 more
core   +1 more source

A Core-sensitive Mixed f/g-mode of the Sun Predicted by Wave Topology and Hydrodynamical Simulation

The Astrophysical Journal Letters
Helioseismology has revolutionized our understanding of the Sun by analyzing its global oscillation modes. However, the solar core remains elusive, limiting a full understanding of its evolution.
Arthur Le Saux, Armand Leclerc, Guillaume Laibe, Pierre Delplace, Antoine Venaille   +4 more
doaj   +1 more source

Using magnetic fluids to simulate convection in a central force field in the laboratory [PDF]

Nonlinear Processes in Geophysics, 2005
Large-scale convection in planetary or stellar interiors plays a significant role but it is difficult to reproduce the central force field of those systems in experimental studies.
W.-G. Früh
doaj