42 citations · 181 across the 15 of their papers we have counts for
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Evidence for coherent spicule oscillations by correcting Hinode/SOT Ca II H in the southeast limb of the Sun
Alireza Ahangarzadeh Maralani, Ehsan Tavabi, Ali Ajabshirizadeh
Wave theories of heating the chromosphere, corona, and solar wind due to photospheric fluctuations are strengthened by the existence of observed wave coherency up to the transition…
Evidence for Energy Supply by Active Region Spicules to the Solar Atmosphere
S. Zeighami, A. R. Ahangarzadeh Maralani, E. Tavabi +1
We investigate the role of active region spicules in the mass balance of the solar wind and energy supply for heating the solar atmosphere. We use high cadence observations from th…
Spicules Intensity Oscillations in SOT/HINODE Observations
E. Tavabi, A. Ajabshirizadeh, A. R. Ahangarzadeh Maralani +1
Aims. We study the coherency of solar spicules intensity oscillations with increasing height above the solar limb in quiet Sun, active Sun and active region using observations from…
The Possibility of Kelvin-Helmholtz Instability in Solar Spicules
A. Ajabshirizadeh, H. Ebadi, R. E. Vekalati +1
Transversal oscillations of spicules axes may be related to the propagation of magnetohydrodynamic waves along them. These waves may become unstable and the instability can be of t…
Spectral atlases of the Sun from 3980 to 7100 Å at the center and at the limb
Hassan Fathivavsari, Ali Ajabshirizadeh, Serge Koutchmy
In this work, we present digital and graphical atlases of spectra of both the solar disk-center and of the limb near the Solar poles using data taken at the UTS-IAP & RIAAM (the Un…
Study of Solar Magnetic and Gravitational Energies Through the Virial Theorem
Elham Bazyar, Ali Ajabshirizadeh, Zahra Fazel +1
Virial theorem is important for understanding stellar structures. It produces an interesting connection between the magnetic energy and the gravitational one. Using the general for…
Increasing the Fine Structure Visibility of the Hinode SOT Ca II H Filtergrams
E. Tavabi, S. Koutchmy
We present the improved so-called Madmax (OMC) operator selecting maxima of convexities computed in multiple directions around each pixel rewritten in MatLab and shown to be very e…
Contribution to the modeling of solar spicules
E. Tavabi, S. Koutchmy, A. Ajabshirizadeh
Solar limb and disc spicule quasi- periodic motions have been reported for a long time, strongly suggesting that they are oscillating. In order to clear up the origin and possibly…
Neural Network Prediction of solar cycle 24
A. Ajabshirizadeh, N. Masoumzadeh Jouzdani, S. Abbassi
The ability to predict the future behavior of solar activity has become of extreme importance due to its effect on the near Earth environment. Predictions of both the amplitude and…
A Statistical Analysis of the SOT-Hinode Observations of Solar Spicules and their Wave-like Behavior
E. Tavabi, S. Koutchmy, A. Ajabshirizadeh
We consider a first important parameter of spicules as observed above the solar visible limb: their apparent diameter as a function of the height above the limb which determines th…
Solar gravitational energy and luminosity variations
Z. Fazel, J. P. Rozelot, S. Lefebvre +2
Due to non-homogeneous mass distribution and non-uniform velocity rate inside the Sun, the solar outer shape is distorted in latitude. In this paper, we analyze the consequences of…