Results 21 to 30 of about 9,183 (293)
An attempt to calibrate core overshooting using the seismic properties of low-mass stars
EPJ Web of Conferences, 2015 The sizes of stellar convective cores remain uncertain because of our poor understanding of the interface between convective and radiative zones. The very high precision of the seismic data provided by the CoRoT and Kepler space missions offers a great ...
Deheuvels S. +7 more
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Low-frequency Internal Gravity Waves Are Pseudo-incompressible
The Astrophysical Journal, 2023 Starting from the fully compressible fluid equations in a plane-parallel atmosphere, we demonstrate that linear internal gravity waves are naturally pseudo-incompressible in the limit that the wave frequency ω is much less than that of surface gravity ...
Bradley W. Hindman, Keith Julien
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Angular Momentum Transport in Stellar Interiors [PDF]
, 2018 Stars lose a significant amount of angular momentum between birth and death, implying that efficient processes transporting it from the core to the surface are active.
Aerts, Conny +2 more
core +3 more sources
Differential rotation and meridional flows in stellar convection zones [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractDifferential rotation and meridional flow are key ingredients in flux transport dynamo models of the solar activity cycle. As the subsurface flow pattern is not sufficiently constrained by observations, it is a major source of uncertainty in solar and stellar dynamo models.
Manfred Küker, Günther Rüdiger
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The Astrophysical Journal, 2023 Many of the M-dwarf stars, though they are tiny and dim, are observed to possess strong surface magnetic fields and exhibit remarkably intense flaring. Such magnetism may severely impact habitability on the exoplanets now discovered nearby. The origin of
Connor P. Bice, Juri Toomre
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Global-scale wreath-building dynamos in stellar convection zones [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractWhen stars like our Sun are young they rotate rapidly and are very magnetically active. We explore dynamo action in rapidly rotating suns with the 3-D MHD anelastic spherical harmonic (ASH) code. The magnetic fields built in these dynamos are organized on global-scales into wreath-like structures that span the convection zone.
Brown +9 more
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Excitation of transverse magnetic tube waves in stellar convection zones [PDF]
Astronomy & Astrophysics, 2002 In the previous two papers of this series, we developed an analytical method describing the generation of transverse tube waves in stellar convection zones and used it to compute the wave energy spectra and fluxes for late-type stars with the solar metal abundance (population I stars).
Z. E. Musielak, P. Ulmschneider
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Angular Momentum Transport via Internal Gravity Waves in Evolving Stars [PDF]
, 2014 Recent asteroseismic advances have allowed for direct measurements of the internal rotation rates of many sub-giant and red giant stars. Unlike the nearly rigidly rotating Sun, these evolved stars contain radiative cores that spin faster than their ...
Brown, Ben +3 more
core +2 more sources
27. On meridional circulations in stellar convective zones [PDF]
Symposium - International Astronomical Union, 1958 It is shown in outline by a discussion of the equation of motion in all its components and by taking regard of the geometrical properties of turbulent exchange, that in general the state of pure rotation (without meridional circulations) is not a possible stationary state of motion for convective zones of stars.
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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 +10 more
core +2 more sources