Results 41 to 50 of about 242,574 (198)

Pre-suprenova evolution of rotating massive stars

, 2003
The Geneva evolutionary code has been modified to study the advanced stages (Ne, O, Si burnings) of rotating massive stars. Here we present the results of four 20 solar mass stars at solar metallicity with initial rotational velocities of 0, 100, 200 and
A. Heger, D. Sugimoto, G. Meynet, G. Meynet, M. Limongi, N. Prantzos   +5 more
core   +1 more source

Solar Rotation and Activity for Cycle 24 from SDO/AIA Observations

The Astrophysical Journal
Differential rotation plays a crucial role in the dynamics of the Sun. We study the solar rotation and its correlation with solar activity by applying a modified machine learning algorithm to identify and track coronal bright points (CBPs) from the Solar
Zahra Shokri, Nasibe Alipour, Hossein Safari   +2 more
doaj   +1 more source

Solar cycle-related variation in solar differential rotation and meridional flow in solar cycle 24

Earth, Planets and Space, 2020
We studied temporal variation of the differential rotation and poleward meridional circulation during solar cycle 24 using the magnetic element feature tracking technique.
Shinsuke Imada, Kengo Matoba, Masashi Fujiyama, Haruhisa Iijima   +3 more
doaj   +1 more source

The Sun's Preferred Longitudes and the Coupling of Magnetic Dynamo Modes

, 2003
Observations show that solar activity is distributed non-axisymmetrically, concentrating at "preferred longitudes". This indicates the important role of non-axisymmetric magnetic fields in the origin of solar activity.
Alberto Bigazzi, Alexander Ruzmaikin, Bullard E. C., Choudhuri A. R., Ferriz-Mas A., Ivanova T. S., Moss D., Roberts P. H., Ruediger G., Ruzmaikin A., Stix M., Stix M., Tuominen J.   +12 more
core   +1 more source

Seismic and dynamical solar models i-the impact of the solar rotation history on neutrinos and seismic indicators [PDF]

, 2010
Solar activity and helioseismology show the limitation of the standard solar model and call for the inclusion of dynamical processes in both convective and radiative zones. We concentrate here on the radiative zone and first show the sensitivity of boron
A. Palacios, Bahcall, Bahcall, Bailey, Basu, Basu, Bertello, Bouvier, Bouvier, Bouvier, Brun, Brun, Chaboyer, Couvidat, Couvidat, Decressin, Denissenkov, Domiciano de Souza, Duez, Duez, Eff-Darwich, Gough, Grevesse, Guzik, Guzik, Heger, Hill, Holweger, Iglesias, J. P. Marques, Krishnamurthi, Langer, Lin, Maeder, Maeder, Marques, Mathur, McAlister, Meynet, Michaud, P. A. P. Nghiem, Piau, Richard, S. Turck-Chièze, Serenelli, Siess, Sills, Talon, Talon, Thuillier, Turck-Chièze, Turck-Chièze, Turck-Chièze, Turck-Chièze, Turck-Chièze, van Belle, Yang, Zahn, Zahn   +58 more
core   +3 more sources

Equator to Pole Solar Chromospheric Differential Rotation Using Ca-K Features Derived from Kodaikanal Data

The Astrophysical Journal
Differential rotation is one of the basic characteristics of the Sun, and it plays an important role in generating the magnetic fields and its activities.
Hema Kharayat, Jagdev Singh, Muthu Priyal, B. Ravindra   +3 more
doaj   +1 more source

Dynamic 3D Simulation of Surface Charging on Rotating Asteroids

The Astrophysical Journal
The surface-charging phenomenon of asteroids, mainly resulting from solar wind plasma and solar radiation, has been extensively studied. However, the influence of the asteroid’s rotation on surface charging is not yet fully understood.
Ronghui Quan, Zhiying Song, Zhigui Liu
doaj   +1 more source

Solar Rotation Stereoscopy in Microwaves

The Astrophysical Journal, 1995
We present here the first stereoscopic altitude measurements of active region sources observed at microwave frequencies (10-14 GHz). The active region NOAA 7128 was observed with the Owens Valley Radio Observatory (OVRO) on 1992 April 13, 14, 15, and 16 as it passed through the central meridian.
Gary, DE, Aschwanden, MJ, Lim, J, Klimchuk, JA   +3 more
openaire   +2 more sources

Simulations of turbulent convection in rotating young solar-like stars: Differential rotation and meridional circulation

, 2007
We present the results of three-dimensional simulations of the deep convective envelope of a young (10 Myr) one-solar-mass star, obtained with the Anelastic Spherical Harmonic code.
Allan Sacha Brun, Barnes J. R., Bouvier J., Jerome Ballot, Kitchatinov L. L., Kitchatinov L. L., Kuker M., Miesch M. S., Randich S., Sylvaine Turck‐Chieze, Ventura P., Zahn J.-P.   +11 more
core   +1 more source

Solar cycle induced variations in GONG p-mode frequencies and splittings [PDF]

, 2000
We have analysed the recently available GONG p-mode frequencies and splitting coefficients for a period of three and half years, including the rapidly rising phase of solar cycle 23.
A. Bhatnagar, Anguera Gubau M., Howe R., Kiran Jain, S. C. Tripathy   +4 more
core   +3 more sources