Results 41 to 50 of about 2,333,019 (349)
Evidence of a Quasiperiodic Global-scale Oscillation in the Near-surface Shear Layer of the Sun
The Astrophysical Journal Letters, 2023 We present evidence of hitherto undiscovered global-scale oscillations in the near-surface shear layer of the Sun. These oscillations are seen as large-scale variations of radial shear in both the zonal and meridional flows relative to their mean values.
Richard S. Bogart +4 more
doaj +1 more source
Earth, Planets and Space, 2015 In this paper, the responses of the ionosphere to the solar cycle and solar rotation variations of extreme ultraviolet (EUV) irradiance are comparatively investigated using daily mean global electron content (GEC) and 0.1–50 nm EUV daily flux.
Yiding Chen, Libo Liu, H. Le, Hui Zhang
semanticscholar +1 more source
Rotation Angle for the Optimum Tracking of One-Axis Trackers [PDF]
, 2013 An equation for the rotation angle for optimum tracking of one-axis trackers is derived along with equations giving the relationships between the rotation angle and the surface tilt and azimuth angles.
Dobos, A. P., Marion, W. F.
core +1 more source
Solar and stellar rotation [PDF]
, 2007 Workshop on Solar and Stellar Physics through Eclipses -- MAR 27-29, 2006 -- Ankara Univ, ORSEM Campus, Side, Antalya, TURKEYThe secular evolution of the stellar rotation through angular momentum loss, driven by the stellar wind, and the consequences of ...
Demircan, O., Filiz-Ak, N., Eker, Z.
core +1 more source
On Differential Rotation and Overshooting in Solar-like Stars [PDF]
, 2017 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.
A. Brun +8 more
semanticscholar +1 more source
The 27-Day Oscillation in Ionospheric Total Electron Content Observed by GNSS
AtmosphereThe 27-day oscillation in total electron content (TEC) is analysed by means of world maps of TEC. The TEC maps are derived from measurements of the ground receiver network of the Global Navigation Satellite System (GNSS) and are provided by the ...
Klemens Hocke, Guanyi Ma
doaj +1 more source
The Relative Position of the Solar Magnetic Dipole Axis and Rotation Axis of the Sun
GalaxiesWe estimated the relative location of the solar rotation axis and the magnetic axis of the solar dipole, which were defined as centers of polar coronal holes.
Alexandr Riehokainen +3 more
doaj +1 more source
The mechanism of magnetic flux rope rotation during solar eruption
Frontiers in Physics, 2023 Solar eruptions often show the rotation of filaments, which is a manifestation of the rotation of erupting magnetic flux rope (MFR). Such a rotation of MFR can be induced by either the torque exerted by a background shear-field component (which is an ...
Zhenjun Zhou +9 more
doaj +1 more source
ROTATION PERIODS FOR COOL STARS IN THE 4 Gyr OLD OPEN CLUSTER M67, THE SOLAR–STELLAR CONNECTION, AND THE APPLICABILITY OF GYROCHRONOLOGY TO AT LEAST SOLAR AGE [PDF]
, 2016 We report rotation periods for 20 cool (FGK) main sequence member stars of the 4 Gyr-old open cluster M67 (=NGC 2682), obtained by analyzing data from Campaign 5 of the K2 mission with the Kepler Space Telescope. The rotation periods delineate a sequence
S. Barnes +4 more
semanticscholar +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