2.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Ilia State UniversityGE219 papers
- Instituto de Astrofísica de AndalucíaES90 papers
- Center for Astrophysics Harvard & SmithsonianUS82 papers
- Osservatorio Astrofisico di TorinoIT81 papers
- National Institute for AstrophysicsIT77 papers
- Boston UniversityUS72 papers
- Pulkovo ObservatoryRU71 papers
- Instituto de Astrofísica de CanariasES70 papers
- Space Research InstituteRU70 papers
- Centre National de la Recherche ScientifiqueFR69 papers
- Kansas State UniversityUS69 papers
- St Petersburg UniversityRU69 papers
10 papers · 2 filters
Determination of homogenized effective temperatures from stellar catalogs
Malyuto, Shvelidze
Some selected catalogs of the effective temperatures for F, G and K stars are analyzed. By an improved technique we estimate the external errors of these catalogs from data interco…
Frequency drifts of 3-min oscillations in microwave and EUV emission above sunspots
R. Sych, T. V. Zaqarashvili, V. M. Nakariakov +3
We analyse 3-min oscillations of microwave and EUV emission generated at different heights of a sunspot atmosphere, studying the amplitude and frequency modulation of the oscillati…
Damping of Alfven waves in solar partially ionized plasmas: effect of neutral helium in multi-fluid approach
T. V. Zaqarashvili, M. L. Khodachenko, H. O. Rucker
Chromospheric and prominence plasmas contain neutral atoms, which may change the plasma dynamics through collision with ions. Most of the atoms are neutral hydrogen, but a signific…
Numerical simulations of solar macrospicules
K. Murawski, Abhishek K. Srivastava, T. V. Zaqarashvili
Context. We consider a localized pulse in the component of velocity, parallel to the ambient magnetic field lines, that is initially launched in the solar chromosphere. Aims. We ai…
Stability of self-gravitating discs under irradiation
W. K. M. Rice, P. J. Armitage, G. R. Mamatsashvili +2
Self-gravity becomes competitive as an angular momentum transport process in accretion discs at large radii, where the temperature is low enough that external irradiation likely co…
Rossby waves and polar spots in rapidly rotating stars: Implications for stellar wind evolution
T. V. Zaqarashvili, R. Oliver, J. L. Ballester +5
Rapidly rotating stars show short-period oscillations in magnetic activity and polar appearance of starspots. The aim of this paper is to study large-scale shallow water waves in t…
Excitation of spiral density waves by convection in accretion discs
G. R. Mamatsashvili, W. K. M. Rice
Motivated by the recent results of \citet{Lesur_Ogilvie10} on the transport properties of incompressible convection in protoplanetary discs, in this paper we study the role of comp…
Magnetohydrodynamic waves in solar partially ionized plasmas: two-fluid approach
T. V. Zaqarashvili, M. K. Khodachenko, H. O. Rucker
We derive the dynamics of magnetohydrodynamic waves in two-fluid partially ionized plasmas and to compare the results with those obtained under single-fluid description. Two-fluid…
The excitation of 5-min oscillations in the solar corona
T. V. Zaqarashvili, K. Murawski, M. K. Khodachenko +1
We aim to study excitation of the observed 5-min oscillations in the solar corona by localized pulses that are launched in the photosphere. We solve the full set of nonlinear one-d…
Observation of Kink Instability as Driver of Recurrent Flares in AR 10960
A. K. Srivastava, Pankaj Kumar, T. V. Zaqarashvili +3
We study the active region NOAA 10960, which produces two flare events (B5.0, M8.9) on 04 June 2007. We find the observational signature of right handed helical twists in the loop…