Results 31 to 40 of about 2,333,019 (349)

Systematic regularity of solar coronal rotation during the time interval 1939–2019 [PDF]

Monthly notices of the Royal Astronomical Society, 2019
The temporal variation of solar coronal rotation appears to be very complex and its relevance to the 11-year solar activity cycle is still unclear. Using the modified coronal index for the time interval from 1939 January 1–2019 May 31, the systematic ...
L. Deng, X. Zhang, H. Deng, Y. Mei, F. Wang   +4 more
semanticscholar   +1 more source

The magnetosphere under weak solar wind forcing [PDF]

, 2007
The Earth's magnetosphere was very strongly disturbed during the passage of the strong shock and the following interacting ejecta on 21–25 October 2001. These disturbances included two intense storms (Dst*≈−250 and −180 nT, respectively).
Rich, F. J., S. W. H. Cowley, Jordanova, V. K., R. B. Torbert, S. W. H. Cowley (7590302), A. Sharma, Y. Miyoshi (7592057), Adrian Grocott (7590026), Farrugia, Charlie J., V. K. Jordanova (7592063), C. J. Farrugia, A. Grocott, Sharma, A., V. K. Jordanova, C. J. Farrugia (7592051), Farrugia, C. J., P. E. Sandholt (7592054), R. B. Torbert (7592066), Grocott, A., Miyoshi, Y., P. E. Sandholt, Torbert, Roy B., Sandholt, P. E., Y. Miyoshi, Cowley, S. W. H., A. Sharma (5739), F. J. Rich, Torbert, R. B., F. J. Rich (7592060)   +28 more
core   +1 more source

Heartbeat of the sun from principal component analysis and prediction of solar activity on a millenium timescale [PDF]

, 2015
We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21-24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves travelling from
Shepherd, Simon J., Zharkov, Sergei I., Zharkova, V. V., Zharkov, Sergei, Popova, E., Shepherd, S. J., Zharkova, Valentina, Shepherd, Simon, Zharkov, S. I., Popova, Elena, Zharkova, Valentina V.   +10 more
core   +1 more source

Latitudinal differential rotation in the solar analogues 16 Cygni A and B [PDF]

Astronomy & Astrophysics, 2019
Context. Asteroseismology has undergone a profound transformation as a scientific field following the CoRoT and Kepler space missions. The latter is now yielding the first measurements of latitudinal differential rotation obtained directly from ...
M. Bazot, O. Benomar, J. Christensen-Dalsgaard, L. Gizon, S. Hanasoge, M. Nielsen, P. Petit, K. Sreenivasan   +7 more
semanticscholar   +1 more source

Rotation rate of the solar core as a key constraint to magnetic angular momentum transport in stellar interiors [PDF]

Astronomy & Astrophysics, 2019
Context. The internal rotation of the Sun constitutes a fundamental constraint when modelling angular momentum transport in stellar interiors. In addition to the more external regions of the solar radiative zone probed by pressure modes, measurements of ...
P. Eggenberger, G. Buldgen, S. Salmon
semanticscholar   +1 more source

Grids of stellar models with rotation - I. Models from 0.8 to 120 M⊙ at solar metallicity (Z = 0.014) [PDF]

, 2011
Aims. Many topical astrophysical research areas, such as the properties of planet host stars, the nature of the progenitors of different types of supernovae and gamma ray bursts, and the evolution of galaxies, require complete and homogeneous sets of ...
S. Ekstrom, C. Georgy, P. Eggenberger, G. Meynet, N. Mowlavi, A. Wyttenbach, A. Granada, T. Decressin, R. Hirschi, U. Frischknecht, C. Charbonnel, A. Maeder   +11 more
semanticscholar   +1 more source

Origin of the Solar Rotation Harmonics Seen in the EUV and UV Irradiance

, 2021
International audienceLong-term periodicities in the solar irradiance are often observed with periods proportional to the solar rotational period of 27 days.
Kariyappa, R., Giono, G., Damé, Luc, Zender, J., J., Giono, Gabriel,, Dame, L.,, Zender, J. J.,, Kariyappa, R.,   +7 more
core   +1 more source

Asymptotic g modes: Evidence for a rapid rotation of the solar core [PDF]

, 2017
We present the identification of very low frequency g modes in the asymptotic regime and two important parameters that have long been waited for: the core rotation rate, and the asymptotic equidistant period spacing of these g modes.
E. Fossat, P. Boumier, T. Corbard, J. Provost, D. Salabert, F. Schmider, A. Gabriel, G. Grec, C. Renaud, J. Robillot, T. Roca-Cort'es, S. Turck-chièze, R. Ulrich, M. Azur, Cnrs, Laboratoire Lagrange, France., I. D. Spatiale, U. Paris-sud, Laboratoire Aim Paris-Saclay, CEADRF-CNRS-Univ. Paris Diderot - IRFUSAp, Lab, D. Astrof'isica, U. L. Laguna, Spain., Instituto de Astrof'isica de Canarias, D. Physics, A. Department, U. Angeles, U.S.A., L. Laboratory, Oukaimeden Observatory, Cadi Ayyad University Fssm, Morocco.   +33 more
semanticscholar   +1 more source

Study on the relation of the solar coronal rotation with magnetic field structures

Scientific Reports, 2023
Daily solar spectral irradiances (SSIs) at the spectral intervals 1–40, 116–264 and 950–1600 nm and four categories of solar small-scale magnetic elements ( $$MF_{no}$$ M F no , $$MF_{anti}$$ M F anti , $$MF_{tran}$$ M F tran and $$MF_{in}$$ M F in ) are
N. B. Xiang, X. H. Zhao, L. H. Deng, F. Y. Li, S. Zheng   +4 more
doaj   +1 more source

On the claim of modulations in radon decay and their association with solar rotation

, 2018
Claims were made by Sturrock et al. that radioactive decay can be induced by interaction of the nucleus with solar neutrinos and that cyclic modulations in decay rates are indicative of the dynamics of the solar interior.
S. Pommé, G. Lutter, M. Marouli, K. Kossert, O. Nähle   +4 more
semanticscholar   +1 more source