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Stellar Rotation
This textbook highlights mechanisms, properties, observations, and research progress of solar and stellar rotation. The rotation of stars is a basic...
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Height-dependent differential rotation of the solar atmosphere detected by CHASE
Rotation is an intrinsic property of stars and provides essential constraints on their structure, formation, evolution and interaction with the...
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The Sun’s Large-Scale Flows I: Measurements of Differential Rotation & Torsional Oscillation
We have developed a comprehensive catalog of the variable differential rotation measured near the solar photosphere. This catalog includes...
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Differential Rotation of Large Long-Lived Sunspot Groups and Their Morphological Structure
AbstractNagovitsyn et al. (2018) revealed two modes of the latitude dependence of the rotation rate of large long-lived sunspot groups, but precisely...
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Differential Rotation of Solar Filaments Early Observed by the OGAUC in the Period 1929 – 1941
The solar filaments obtained from the daily Ca ii K3 observations at the Coimbra Astronomical Observatory, which is now called the Geophysical and...
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Solar differential rotation reproduced with high-resolution simulation
The Sun rotates differentially with a fast equator and slow pole
1 . Convection in the solar interior is thought to maintain the differential rotation....
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Rotation Profiles of Coronal Bright Points Inside and Outside of Coronal Holes
The rotation of the solar corona is not a fully resolved issue. Coronal holes (CHs) reveal sometimes more rigid, but in other cases more differential...
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Bošković’s Method for Determining the Axis and Rate of Solar Rotation by Observing Sunspots in 1777
In 1777 Ruđer Bošković observed sunspots, determined their positions and the solar rotation elements by his own methods briefly described here. We...
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Chinese sunspot drawings and their digitization − (IV) differential rotation profile determined from hand-drawing records
It is necessary to better understand the dynamic process of solar differential rotation. Here the hand-drawing sunspot group records from 1958 to...
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Periodicity in the Rotation of the Solar Transition Region and Sunspot Numbers
The long-term study of the temporal variation of the rotation period of the solar photosphere, chromosphere, and corona has been widely undertaken....
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Dependence of Solar Supergranular Lifetime on Surface Magnetic Activity and Rotation
AbstractThe lifetimes and length-scales for supergranular cells in active and quiescent regions of the solar chromosphere, and the relation between...
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Halo Effect on Bar Rotation in Galaxies
The effect of a massive gravitating halo on the rotation of an ellipsoidal bar in disk galaxies is studied. The method is based on calculating the...
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Differential Rotation of Stars in Spectral Class A
Published data indicate a substantial increase in the differential rotation parameter ∆Ω of stars hotter than 6700 K. By analyzing the shape of the...
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High-Resolution Observation of Blowout Jets Regulated by Sunspot Rotation
Coronal jets are believed to be the miniature version of large-scale solar eruptions. In particular, the eruption of a minifilament inside the base...
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On Optimal Rigid Body Rotation with Application of Internal Forces
AbstractThe article describes the result obtained for the problem of a rigid body’s maximum rotation in a given time interval by moving a movable...
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Control of the Rotation of a Solid (Spacecraft) with a Combined Optimality Criterion Based on Quaternions
AbstractThe dynamic problem of the optimal rotation of a rigid body (for example, a spacecraft) from an arbitrary initial to a designated final...
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Variations in the Earth’s rotation rate measured with a ring laser interferometer
An exact knowledge of the instantaneous Earth’s rotation rate is indispensable for accurate navigation and geolocation. Fluctuations in the length of...
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Long–Term Variations in Solar Differential Rotation and Sunspot Activity, II: Differential Rotation Around the Maxima and Minima of Solar Cycles 12 – 24
Studies of variations in the solar differential rotation are important for understanding the underlying mechanism of solar cycle and other variations...
