Results 11 to 20 of about 2,754,875 (281)

On Differential Rotation and Overshooting in Solar-like Stars [PDF]

The Astrophysical Journal, 2017
Abstract We seek to characterize how the change of global rotation rate influences the overall dynamics and large-scale flows arising in the convective envelopes of stars covering stellar spectral types from early G to late K. We do so through numerical simulations with the ASH code, where we consider stellar convective envelopes coupled
Allan Sacha Brun, Antoine Strugarek, Jacobo Varela, Sean P. Matt, Kyle C. Augustson, Constance Emeriau, Olivier Long DoCao, Benjamin Brown, Juri Toomre   +8 more
core   +10 more sources

The solar differential rotation in the 18th century [PDF]

Astronomy & Astrophysics, 2012
The sunspot drawings of Johann Staudacher of 1749--1799 were used to determine the solar differential rotation in that period. These drawings of the full disk lack any indication of their orientation. We used a Bayesian estimator to obtain the position angles of the drawings, the corresponding heliographic spot positions, a time offset between the ...
Arlt, R., Froehlich, H. -E.
openaire   +3 more sources

The impact of differential rotation on the stochastic excitation of acoustic modes in solar-like pulsators

Astronomy & Astrophysics
Context. Acoustic modes are excited by turbulent convection in the outer convective envelope of solar-like stars. Observational results from asteroseismic studies have shown that 44% of solar-like stars do not present detectable stochastically excited ...
Biscarrat G., Bessila L., Mathis S.
doaj   +2 more sources

Study on the Temporal Evolution of the Radial Differential Rotation of Solar Corona Using Radio Emissions

The Astrophysical Journal
The daily measurements of the disk-integrated solar radio flux, observed by the Radio Solar Telescope Network, at 245, 410, 610, 1415, 2695, 4995, and 8800 MHz during the time interval of 1989 January 1 to 2019 December 17, are used to investigate the ...
N. B. Xiang, X. H. Zhao, L. H. Deng, F. Y. Li, Y. J. Wang, X. W. Tan   +5 more
doaj   +2 more sources

Relationship between solar wind corotating interaction regions and the phasing and intensity of Saturn kilometric radiation bursts [PDF]

, 2008
Voyager spacecraft measurements of Saturn kilometric radiation (SKR) identified two features of these radio emissions: that they pulse at a period close to the planetary rotation period, and that the emitted intensity is correlated with the solar wind ...
L. Lamy, Badman, S. V., S. W. H. Cowley, Lamy, L., P. Zarka, S. V. Badman, B. Cecconi, L. Lamy (7600208), Cecconi, B., P. Zarka (7600217), S. V. Badman (7590704), B. Cecconi (7600220), Stanley W. H. Cowley (7590644), Cowley, S. W. H., Zarka, P.   +14 more
core   +6 more sources

Transition from anti-solar to solar-like differential rotation: Dependence on Prandtl number [PDF]

, 2022
(abridged) Context: Late-type stars such as the Sun rotate differentially due to the interaction of turbulent convection and rotation. Aims: The aim of the study is to investigate the effects of the thermal Prandtl number on the transition from anti ...
Käpylä, Petri J.,, P. J. Käpylä, Käpylä, Petri J., Käpylä, P. J.   +3 more
core   +1 more source

Grand Minima in a spherical non-kinematic α2Ω mean-field dynamo model

Journal of Space Weather and Space Climate, 2020
We present a non-kinematic axisymetric α2Ω mean-field dynamo model in which the complete α-tensor and mean differential rotation profile are both extracted from a global magnetohydrodynamical simulation of solar convection producing cycling large-scale ...
Simard Corinne, Charbonneau Paul
doaj   +1 more source

Differential rotation of Kepler-71 via transit photometry mapping of faculae and starspots [PDF]

, 2019
Knowledge of dynamo evolution in solar-type stars is limited by the difficulty of using active region monitoring to measure stellar differential rotation, a key probe of stellar dynamo physics.
Zaleski, S. M., Valio, A., Marsden, S. C., Carter, B. D.   +3 more
core   +1 more source

Anti‐solar differential rotation

Astronomische Nachrichten, 2004
AbstractThe differential rotation of anti‐solar type detected by observations for several stars may result from a fast meridional flow. The sufficiently intensive meridional circulation may be caused by large‐scale thermal inhomogeneities or, perhaps, by tidal forcing from a companion star.
Kitchatinov, L. L., Rüdiger, G.
openaire   +2 more sources

Minuscule Corrections to Near-surface Solar Internal Rotation Using Mode Coupling

The Astrophysical Journal Supplement Series, 2023
The observed solar oscillation spectrum is influenced by internal perturbations such as flows and structural asphericities. These features induce splitting of characteristic frequencies and distort the resonant-mode eigenfunctions.
Srijan Bharati Das, Samarth G. Kashyap, Deniz Oktay, Shravan M. Hanasoge, Jeroen Tromp   +4 more
doaj   +1 more source