390 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Institute for Research in Fundamental SciencesIR72 papers
- Azarbaijan Shahid Madani UniversityIR29 papers
- Research Institute for Astronomy and Astrophysics of MaraghIR26 papers
- Centre National de la Recherche ScientifiqueFR16 papers
- Islamic Azad University, TehranIR16 papers
- Institute for Cognitive Science StudiesIR15 papers
- Islamic Azad University of TabrizIR12 papers
- University of ZanjanIR12 papers
- Institut d'Astrophysique de ParisFR10 papers
- Payame Noor UniversityIR10 papers
- Sharif University of TechnologyIR10 papers
- Shahid Beheshti UniversityIR7 papers
33 papers · 1 filter
The Efficiency of Harmonic Emissions Excited by Energetic Electrons in Coronal Loops
Mehdi Yousefzadeh, Alexey Kuznetsov, Yao Chen +1
Magnetic reconnection is a key process that drives the energy release in solar flares. This process can occur at multiple locations along the coronal loop. The reconnection generat…
Concurrent Kink and Sausage Waves in A Crescent Shaped Structure Over A Limb Prominence
Maryam Ghiasi, Neda Dadashi, Hossein Ebadi
A Crescent shaped prominence Structure (CS), over the solar west limb is studied using EIS/HINODE and AIA/SDO. First, the time varying positions of the top and below borders of the…
Harmonic Electron Cyclotron Maser Emission along the Coronal Loop
Mehdi Yousefzadeh, Yao Chen, Hao Ning +1
Efficient radiation at second and/or higher harmonics of Wce has been suggested to circumvent the escaping difficulty of the electron cyclotron maser emission mechanism when it is…
Capture rate of weakly interacting massive particles (WIMPs) in binary star systems
Ebrahim Hassani, Hossein Ebadi, Reza Pazhouhesh +1
The distribution of dark matter (DM) inside galaxies is not uniform. Near the central regions, its density is the highest. Then, it is logical to suppose that, inside galaxies, DM…
KIC~8975515: a fast-rotating ( Dor - Sct) hybrid star with Rossby modes and a slower Sct companion in a long-period orbit
A. Samadi-Ghadim, P. Lampens, D. M. Jassur +1
{KIC~8975515 is a \emph{Kepler} double-lined spectroscopic binary system with hybrid pulsations. Two components have similar atmospheric properties (T 7400~K), a…
Effect of the Temperature of Background Plasma and the Energy of Energetic Electrons on Z-Mode Excitation
Chuanyang Li, Yao Chen, Xiangliang Kong +2
It has been suggested that the Z-mode instability driven by energetic electrons with a loss-cone type velocity distribution is one candidate process behind the continuum and zebra…
Proper Motions of Sunspots' Umbral Dots at High Temporal and Spatial Resolution
Hadis Goodarzi, Serge Koutchmy, Ali Adjabshirizadeh
To deepen the analysis of the photometric properties of the umbra of a sunspot, we study proper motions of small features such as umbral dots (UDs) inside a single sunspot observed…
Analysis of a Failed Eclipse Plasma Ejection Using EUV Observations
E. Tavabi, S. Koutchmy, C. Bazin
The photometry of eclipse white-light (W-L) images showing a moving blob is interpreted for the first time together with observations from space with the PRoject for On Board Auton…
Synchronized Observations of Bright Points from the Solar Photosphere to Corona
Ehsan Tavabi
One of the most important features in the solar atmosphere is magnetic network and its rela- tionship with the transition region (TR), and coronal brightness. It is important to un…
Multi-technique investigation of the binary fraction among A-F type candidate hybrid variable stars discovered by Kepler
P. Lampens, Y. Frémat, L. Vermeylen +14
Hundreds of candidate hybrid pulsators of intermediate type A-F were revealed by the recent space missions. Hybrid pulsators allow to study the full stellar interiors, where p- and…
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…
The period ratio P_1/P_2 of torsional Alfvén waves with steady flows in spicules
H. Ebadi, S. Shahmorad, S. Vasheghani Farahani
The aim here is to model the standing torsional oscillations in solar spicules in the presence of density stratification, magnetic field expansion, and steady flows. By implementin…
Mode coupling in solar spicule oscillations
Zahra Fazel
In a real medium which has oscillations, the perturbations can cause the energy transfer between different modes. The perturbation interpreted as an interaction between the modes i…
Improved SOT (Hinode mission) high resolution solar imaging observations
Hadis Goodarzi, Serge Koutchmy, Ali Adjabshirizadeh
We consider the best today available observations of the Sun free of turbulent Earth atmospheric effects, taken with the Solar Optical Telescope (SOT) onboard the Hinode spacecraft…
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…
The study of magnetic reconnection in solar spicules
Z. Fazel, H. Ebadi
This work is devoted to study the magnetic reconnection instability under solar spicule conditions. Numerical study of the resistive tearing instability in a current sheet is prese…
Observation of kink waves and their reconnection-like origin in solar spicules
H. Ebadi, M. Ghiassi
We analyze the time series of Ca II H-line obtained from Hinode/SOT on the solar limb. We follow three cases of upwardly propagating kink waves along a spicule and inverted Y-shape…
Torsional Alfven waves and the period ratio P_1/P_2 in spicules
Hossein Ebadi, Sadagat Shahmorad
The effects of both density stratification and magnetic field expansion on torsional Alfven waves in solar spicules are studied. Also, their eigenfrequencies, eigenfunctions, and t…
Observation of the period ratio P_1/P_2 of transversal oscillations in solar macro-spicules
H. Ebadi, M. Khoshrangbaf
We analyze the time series of oxygen line profiles (O vi 1031.93 A and O vi 1037.61 A obtained from SUMER/SOHO on the solar south limb. We calculated Doppler shifts and consequentl…
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…
Non-linear damping of visco-resistive Alfven waves in solar spicules
Z. Fazel, H. Ebadi
Interaction of Alfven waves with plasma inhomogeneities generates phase mixing which can lead to dissipate Alfven waves and to heat the solar plasma. Here we study the dissipation…
Evidences to the pulse like origin of double spicules based on Hinode/SOT observations
H. Ebadi
We analyze the time series of H line obtained from Hinode/SOT on the solar limb. The wavelet analysis shows that there are nice correlations between dynamical properties of the…
On the role of transition region on the Alfven wave phase mixing in solar spicules
Z. Fazel, H. Ebadi
Alfvenic waves are thought to play an important role in coronal heating and solar wind acceleration. Here we investigate the dissipation of standing Alfven waves due to phase mixin…