Results 21 to 30 of about 95,125 (291)
Exploring the Temporal Variation of the Solar Quadrupole Moment J 2
The Astrophysical Journal, 2023 Recently, Rozelot & Eren pointed out that the first solar gravitational moment ( J _2 ) might exhibit a temporal variation. The suggested explanation is through the temporal variation of the solar rotation with latitude.
Saliha Eren, Jean-Pierre Rozelot
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MODELING OF DIFFERENTIAL ROTATION IN RAPIDLY ROTATING SOLAR-TYPE STARS [PDF]
The Astrophysical Journal, 2011 36 pages, 10 figures, accepted to ...
Hotta, Hideyuki, Yokoyama, Takaaki
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Influence of projection effects on the observed differential rotation rate in the UV corona
Journal of Advanced Research, 2013 Following previous investigations by Giordano and Mancuso [1] and Mancuso and Giordano [2,3] on the differential rotation of the solar corona as obtained through the analysis of the intensity time series of the O VI 1032 Å spectral line observed by the ...
Salvatore Mancuso, Silvio Giordano
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Solar Oblateness and Differentially Rotating Polytropes [PDF]
International Astronomical Union Colloquium, 1970 Dicke and Goldenberg (1967a) measured the solar oblateness to be σ= (5±0.7) × 10-5 and subsequently interpreted this measurement as evidence that the solar interior rotates with a period of 1.d8. With this interpretation, they then showed that the observed oblateness causes an 8% discrepancy in the Einstein prediction of the perihelion advance of ...
G. G. Fahlman +2 more
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Periodic Change of Solar Differential Rotation [PDF]
The Astrophysical Journal, 2005 The periodic oscillation of the inhomogeneous rotation of the Sun is studied by use of the MHD dynamo theory. There exists a turbulent electromotive force that is driven by the vorticity of the flow (i.e., the γ dynamo). In addition, its counterpart exists in the vorticity equation, that is, the rotation is induced by an inhomogeneous magnetic field in
S.‐I. Itoh +3 more
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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.
Carter, B. D. +3 more
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Rotating Turbulent Thermal Convection and Solar Differential Rotation
, 2022 The expansion of the rotating fluid will change the vorticity and rotational speed of the expanding region. In turbulent thermal convection, this microscopic effect is preserved. Tracking the fluid micelles shows that the average vorticity varies with density, producing vorticity transport and angular momentum transport from the low-density area to the
Chen, Haibin, Wu, Rong
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Radial differential rotation of solar corona using radio emissions [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2021 ABSTRACT The present work is an effort to investigate possible radial variations in the solar coronal rotation by analysing the solar radio emission data at 15 different frequencies (275–1755 MHz) for the period starting from 1994 July to 1999 May.
Singh, Vivek Kumar +4 more
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Probing the rotation rate of solar active regions: the comparison of methods
Open Astronomy, 2022 Sunspot groups are often used as tracers to probe the differential rotation of the Sun. However, the results on the rotation rate variation obtained by different authors are not always in agreement. The reason for this might be a number of effects.
Kutsenko Alexander S. +1 more
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V889 Her: abrupt changes in the magnetic field or differential rotation?
The Open Journal of Astrophysics, 2022 We have applied Zeeman-Doppler imaging (ZDI) to an extensive spectropolarimetric HARPSpol data set of the magnetically active young solar analogue V889 Her, covering 35 spectra obtained during six nights in May 2011.
Teemu Willamo +4 more
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