Results 11 to 20 of about 9,183 (293)
Convective Boundary Mixing in Main-Sequence Stars: Theory and Empirical Constraints
Galaxies, 2023 The convective envelopes of solar-type stars and the convective cores of intermediate- and high-mass stars share boundaries with stable radiative zones.
Evan H. Anders, May G. Pedersen
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Linear Convective Modes and the Energy Transport in Stellar Convection Zones
The Astrophysical Journal, 1973 Model stars whose convection zones had been prepared in accordance with the standard mixing-length theory were used as a basis for the computation of unstable convective modes. It was found that no superposition of statistically independent, nonviscous, adiabatic, convective modes can reproduce the radial dependence of the convective flux of the model.
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Observations of Cool-Star Magnetic Fields
Living Reviews in Solar Physics, 2012 Cool stars like the Sun harbor convection zones capable of producing substantial surface magnetic fields leading to stellar magnetic activity. The influence of stellar parameters like rotation, radius, and age on cool-star magnetism, and the importance ...
Ansgar Reiners
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Acoustic modes in M67 cluster stars trace deepening convective envelopes. [PDF]
NatureReyes C +5 more
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Plumes in Stellar Convection Zones [PDF]
Annals of the New York Academy of Sciences, 2000 Abstract: All numerical simulations of compressible convection reveal the presence of strong downward directed flows. Thanks to helioseismology, such plumes have now also been detected at the top of the solar convection zone, on supergranular scales. Their properties may be crudely described by adopting Taylor's turbulent entrainment hypothesis, whose
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Hunting for giant cells in stellar convection zones [PDF]
Astrophysical Dynamics: from Stars to Galaxies, IAU Symposium 271, 2010 Abstract3D high resolution simulations for the convective zone of a 4Myr old 0.7 M⊙ pre-main sequence star in gravitational contraction are carried out with different radial density contrast using the pseudo spectral ASH code (Brun et al. 2004). We extract giant cells signal from the complex surface convective patterns by using a wavelet analysis.
Bessolaz & Brun, A.S.
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Convection Zones in Stellar Atmospheres.
The Astrophysical Journal, 1962 In following the evolution of stars to the cooler regions of giants in the H-R diagram, core solutions are fitted with the atmospheric solutions; this parameter is the constant that joins the pressure and temperature at the end of the ionization zone. The distribution of this parameter in the H-R diagram was studied by computing atmospheric models. The
K. S. Krishna Swamy, R. S. Kushwaha
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Torsional magnetic tube waves in stellar convection zones [PDF]
Astronomy & Astrophysics, 2003 An analytic approach to the generation of torsional magnetic tube waves in stellar convection zones is presented. The waves are produced in a thin, vertically oriented magnetic flux tube embedded in a magnetic field-free, turbulent and compressible external medium and are excited by external turbulent flows.
M. W. Noble +2 more
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One Zone Modeling of Irregular Variability of Stellar Convective Envelope [PDF]
International Astronomical Union Colloquium, 1993 AbstractOne zone modeling of the irregular variability of red super-giants is intended with regard to the nonlinear coupling of finite amplitude pulsation with convection. The nonlocal mixing length is employed for the evaluation of the convective flux, the turbulent pressure and the turbulent power of temperature fluctuations. The radial pulsation and
Unno, W., Xiong, D.-R.
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Can Extra Mixing in RGB and AGB Stars Be Attributed to Magnetic Mechanisms? [PDF]
, 2007 It is known that there must be some weak form of transport (called cool bottom processing, or CBP) acting in low mass RGB and AGB stars, adding nuclei, newly produced near the hydrogen-burning shell, to the convective envelope.
Andrea Calandra +21 more
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