Results 31 to 40 of about 4,752 (297)
Surface differential rotation and photospheric magnetic field of the young solar-type star HD 171488 (V889 Her) [PDF]
, 2006 We present spectropolarimetric observations of the young, single early G-dwarf HD 171488. These observations were obtained over a five-night period in 2004 September at the 3.9-m Anglo-Australian Telescope using the SEMPOL spectropolarimeter visitor ...
Donati, J-F. +7 more
core +1 more source
Differential rotation in solar convective dynamo simulations [PDF]
Advances in Space Research, 2016 27 pages, 11 figures, accepted for publication in Advances in Space ...
Fan, Yuhong, Fang, Fang
openaire +2 more sources
Impact of anti-solar differential rotation in mean-field solar-type dynamos
, 2022 Context. Over the course of their lifetimes, the rotation of solar-type stars goes through different phases. Once they reach the zero-age main sequence, their global rotation rate decreases during the main sequence until at least the solar age ...
G. Depambour +7 more
core +1 more source
INTERNAL-CYCLE VARIATION OF SOLAR DIFFERENTIAL ROTATION [PDF]
The Astrophysical Journal Supplement Series, 2013 The latitudinal distributions of the yearly mean rotation rates measured respectively by Suzuki in 1998 and 2012 and Pulkkinen $\&$ Tuominen in 1998 are utilized to investigate internal-cycle variation of solar differential rotation. The rotation rate at the solar Equator seems to decrease since cycle 10 onwards.
Li, K. J., Xie, J. L., Shi, X. J.
openaire +2 more sources
2D dynamics of the radiative core of low mass stars
EPJ Web of Conferences, 2017 Understanding the internal rotation of low mass stars all along their evolution is of primary interest when studying their rotational dynamics, internal mixing and magnetic field generation.
Hypolite Delphine +2 more
doaj +1 more source
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
openaire +1 more source
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
doaj +1 more source
Differential Rotation in the Solar Interior [PDF]
International Astronomical Union Colloquium, 1970 One of the big problems in stellar rotation which has been the object of much debate recently concerns the magnitude of the angular velocity in the central regions of the sun. It is a good example of our general ignorance of the distribution of angular momentum in the interiors of stars. There is good reason, of course, for this ignorance.
openaire +1 more source
Differential Rotation and Dynamics of the Solar Interior [PDF]
Science, 1996 Splitting of the sun's global oscillation frequencies by large-scale flows can be used to investigate how rotation varies with radius and latitude within the solar interior. The nearly uninterrupted observations by the Global Oscillation Network Group (GONG) yield oscillation power spectra with high duty cycles and high signal-to-noise ratios ...
Thompson, M. +25 more
openaire +4 more sources
A study of the rapid rotator ζ Aql : differential surface rotation? [PDF]
, 2023 We report new, extremely precise photopolarimetry of the rapidly-rotating A0 main-sequence star ζ Aql, covering the wavelength range ∼400–900 nm, which reveals a rotationally-induced signal.
Bailey, Jeremy +5 more
core +1 more source