Results 261 to 270 of about 95,125 (291)

The Solar Differential Rotation: Present Status of Observations

Solar Physics, 1985
The present status of observations regarding the solar differential rotation is reviewed from contributions published in the last two decades. The paper does not deal with the theory; it mentions theoretical aspects only where they are needed to guide and to understand observational efforts and results.
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22-Year Periodicity in the Solar Differential Rotation

International Astronomical Union Colloquium, 2000
AbstractUsing the data on sunspot groups compiled during 1879–1975, we determined variations in the differential rotation coefficientsAandBduring the solar cycle. The variation in the equatorial rotation rateAis found to be significant only in the odd numbered cycles, with an amplitude ∼ 0.01μrads−1.
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The solar differential rotation from the eightteenth solar cycle

Astrophysics and Space Science, 1982
The sidereal daily rotation of the Sun, ζ(φ), depends on the data used. From an appropriate selection of the data — sunspots with regular motion — it is found that ζ(φ)=14.31–2.70 sin2 φ, where φ denotes the heliographic latitude. Moreover, it seems that there is a variation, of the order of 3%, with the solar activity.
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The solar differential rotation: a historical view

Astrophysics and Space Science, 2009
This brief historical review covers the period preceding the advent of helioseismology, when the author actively worked in the field of solar differential rotation and knowledge of the Sun’s dynamics was limited to the observations of surface phenomena, while the interpretation of the internal rotation was demanded solely to theoretical conjectures ...
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Models of solar differential rotation

1984
o-.rr rcdels give the deperrdence of the angular velocity at the Sunis equator on the depth of the convecÈion zcne. In order to drive differential rotation we ccnsidered two different rnechanisxns: latirude depe:rience of the n:xj"ng length and the anisoircpy of :ie turbulent viscosity.
Pidatella, Rosa Maria, Stix, M., Belvedere, G., Paternò. L.   +3 more
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CCD-Doppler measurements of solar differential rotation

Solar Physics, 1996
Using the AT1 CCD camera at the Echelle spectrograph of the GCT at Tenerife, solar Doppler rotation measurements in the photospheric lines Fe I 6301.5 A and 6302.5 A and in the chromospheric line Na-D2 5890.0 A have been made. The line shifts measured at different heliographic latitudes around the limb were corrected for observer motion and converted ...
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Differential coronal rotation and solar activity

2012
We investigated the latitudinal variation in the coronal rotation by using observations taken with Nobeyama Radioheliograph (NoRH) at 17 GHz. The time series bins are formed on different latitude regions of the solar full disc (SFD) radio image, which extend up to ±60◦ in both the hemispheres.
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Hydrodynamical Investigation of the Solar Differential Rotation

Publications of the Astronomical Society of Japan, 1966
Abstract The differential rotation of the sun is investigated from Biermann’s viewpoint which ascribes its cause to the non-isotropy of the eddy viscosity. The hydrogen convection layer is considered to be a thin layer rotating independently of the inner stable region, and its rotational motion is investigated on the basis of Wasiutyński’
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Molecular engineering of contact interfaces for high-performance perovskite solar cells

Nature Reviews Materials, 2022
Furkan H Isikgor, Shingis Zhumagali, Iain McCulloch   +2 more
exaly  

Advantages, challenges and molecular design of different material types used in organic solar cells

Nature Reviews Materials, 2023
Jicheng Yi, Guangye Zhang, Han Yu
exaly