Results 81 to 90 of about 14,186 (205)

Photospheric magnetic vortex structures [PDF]

, 2011
Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
Shelyag, S., Keenan, Francis, F. P. Keenan, Fedun, V., Mathioudakis, Mihalis, Mathioudakis, M., M. Mathioudakis, Shelyag, Sergiy, Erdélyi, Robert, Keenan, F. P., Erdelyi, R., R. Erdélyi, S. Shelyag, V. Fedun, Fedun, Viktor   +14 more
core   +1 more source

X-Ray and Spectral Ultraviolet Observations of Periodic Pulsations in a Solar Flare Fan/Looptop

The Astrophysical Journal
We present simultaneous X-ray and spectral ultraviolet observations of strikingly coherent oscillations in emission from a coronal looptop and fan structure, during the impulsive phase of a long-duration M-class solar flare.
Ryan J. French, Laura A. Hayes, Maria D. Kazachenko, Katharine K. Reeves, Chengcai Shen, Juraj Lörinčík   +5 more
doaj   +1 more source

The propagation and damping of slow magnetoacoustic waves in the solar atmosphere

, 2012
The propagation and damping of slow magnetoacoustic waves in the solar atmosphere is investigated, with particular emphasis placed on waves with periodicities of five minutes. The basic model of a uniform temperature loop is extended by the addition of
Owen, Nicholas Robert
core  

Quasi-periodic modulation of solar and stellar flaring emission by magnetohydrodynamic oscillations in a nearby loop [PDF]

, 2006
We propose a new model for quasi-periodic modulation of solar and stellar flaring emission. Fast magnetoacoustic oscillations of a non-flaring loop can interact with a nearby flaring active region.
V. M. Nakariakov, Verwichte, E., Foullon, Claire, N. P. Young, Nakariakov, V.M., Young, N. P., Foullon, C. (Claire), Young, N.P., Verwichte, E. (Erwin), C. Foullon, E. Verwichte, Nakariakov, V. M. (Valery M.)   +11 more
core   +1 more source

Solar activity and solar flux oscillations

Izvestiya VUZ. Applied Nonlinear Dynamics, 1997
The conditions of full orbit solar flux observation by Solar Constant Monitor (SCM-2) from «Meteor—3» № 7 satellite in February 1995 are described. The power spectra of such daily measurement series of 108 min. duration during two weeks are obtained. The total solar flux oscillations (not registered earlier) with periods range 6-15 min.
Yury Sklyarov, Vasilii Dvinskikh, Yury Brichkov, Vladimir Vorobyov, Alexandr Kotuma   +4 more
openaire   +1 more source

Dominance of 2 Minute Oscillations near the Alfvén Surface

The Astrophysical Journal Letters
Alfvén waves, considered one of the primary candidates for heating and accelerating the fast solar wind, are ubiquitous in spacecraft observations, yet their origin remains elusive.
Zesen Huang, Marco Velli, Chen Shi, Yingjie Zhu, B. D. G. Chandran, Trevor Bowen, Victor Réville, Jia Huang, Chuanpeng Hou, Nikos Sioulas, Mingzhe Liu, Marc Pulupa, Sheng Huang, Stuart D. Bale   +13 more
doaj   +1 more source

Origin of Solar Torsional Oscillations

The Astrophysical Journal, 2007
11 pages, 7 figures.
openaire   +2 more sources

Solar-like Oscillations in Semiregular Variables [PDF]

Astrophysics and Space Science, 2003
Power spectra of the light curves of semiregular variables, based on visual magnitude estimates spanning many decades, show clear evidence for stochastic excitation. This supports the suggestion by Christensen-Dalsgaard et al. (2001) that oscillations in these stars are solar-like, i.e., stochastically excited by convection, with mode lifetimes ranging
openaire   +2 more sources

Propagation and damping of MHD waves in the solar atmosphere

, 2015
Quasi-periodic disturbances have been observed in the outer solar atmosphere for many years. Although first interpreted as upflows (Schrijver et al.
Kiddie, Greg
core  

Magneto-seismology: effect of inhomogeneous magnetic field on transversal coronal loop oscillations

, 2008
The extreme-ultraviolet (EUV) imagers onboard the planned Solar Dynamics Observatory (SDO) and Solar Orbiter (SO) will offer us the best chance yet of using observations of post-flare loop oscillations to probe the fine structure of the corona.
Verth, Gary
core   +1 more source