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
33 papers · 1 filter
Current driven kink instabilities in relativistic jets: dissipation properties
G. Bodo, G. Mamatsashvili, P. Rossi +1
We analyze the evolution of current driven kink instabilities of a highly magnetized relativistic plasma column, focusing in particular on its dissipation properties. The instabili…
Big Bang Nucleosynthesis Limits and Relic Gravitational Waves Detection Prospects
Tina Kahniashvili, Emma Clarke, Jonathan Stepp +1
We revisit the big bang nucleosynthesis (BBN) limits on primordial magnetic fields and/or turbulent motions accounting for the decaying nature of turbulent sources between the time…
Electromagnetic vortex beam dynamics in degenerate electron-positron astrophysical plasmas
V. I. Berezhiani, Z. N. Osmanov, S. V. Mikeladze
For degenerate astrophysical electron-positron plasmas we have considered dynamics of electromagnetic beams carrying angular momentum. It is found for arbitrary level of degeneracy…
Rotation acceleration of asteroids (10115) 1992 SK, (1685) Toro, and (1620) Geographos due to the YORP effect
J. Durech, D. Vokrouhlicky, P. Pravec +28
The rotation state of small asteroids is affected by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, which is a net torque caused by solar radiation directly reflected and…
Measurement of the polytropic index during solar coronal rain using a diagram of the electron density distribution as a function of the electron temperature
Z. M. Vashalomidze, T. V. Zaqarashvili, V. D. Kukhianidze
A differential emission measure (DEM) method is used to evaluate the relationship of the electron density and temperature before and after a coronal rain event during an active sun…
Eruption of prominence triggered by coronal rain in the solar atmosphere observed by SDO/AIA and Stereo/EUVI
Z. M. Vashalomidze, T. V. Zaqarashvili, V. D. Kukhianidze +1
The triggering process for coronal mass ejections (CME) in the solar atmosphere is not fully understood. We use observations from different spacecraft at several wavelengths to det…
Prominence instability and CMEs triggered by massive coronal rain in the solar atmosphere
Z. Vashalomidze, T. V. Zaqarashvili, V. Kukhianidze +3
Triggering process for prominence instability and consequent CMEs is not fully understood. Prominences are maintained by the Lorentz force against the gravity, therefore reduction…
Eigenspectra of solar active region long-period oscillations
G. Dumbadze, B. M. Shergelashvili, S. Poedts +3
We studied the low-frequency h (long-period h) oscillations of active regions (ARs). The investigation is based on an analysis of a time series…
Evolution of primordial magnetic fields during large-scale structure formation
Salome Mtchedlidze, Paola Domínguez-Fernández, Xiaolong Du +5
Primordial magnetic fields could explain the large-scale magnetic fields present in the Universe. Inflation and phase transitions in the early Universe could give rise to such fiel…
Prospects of SETI by small size optical telescopes
Z. N. Osmanov, V. I. Berezhiani
In the present manuscript we consider the possibility of SETI by the small size (with diameters less than 1 m) optical telescopes. Calculations are performed for typical parameters…
Rieger-type periodicity in the total irradiance of the Sun as a star during solar cycles 23-24
Gurgenashvili, E., Zaqarashvili +11
Context. Total solar irradiance allows for the use of the Sun as a star for studying observations of stellar light curves from recent space missions. Aims. We aim to study how the…
Polarization of gravitational waves from helical MHD turbulent sources
Alberto Roper Pol, Sayan Mandal, Axel Brandenburg +1
We use direct numerical simulations of decaying primordial hydromagnetic turbulence with helicity to compute the resulting gravitational wave (GW) production and its degree of circ…
Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +284
We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with special focus on the multi-band flux co…
Meterwavelength Single-pulse Polarimetric Emission Survey. V. Flux density, component spectral variation and emission states
Rahul Basu, Dipanjan Mitra, George I. Melikidze
We present the flux density measurements of the pulsars observed in the Meterwavelength single-pulse polarimetric emission survey. The average flux densities were estimated in 113…
Convective, absolute and global azimuthal magnetorotational instabilities
A. Mishra, G. Mamatsashvili, V. Galindo +1
We study the convective and absolute forms of azimuthal magnetorotational instability (AMRI) in a Taylor-Couette (TC) flow with an imposed azimuthal magnetic field. We show that th…
Photometry of selected outer main belt asteroids
V. Shevchenko, O. Mikhalchenko, I. Belskaya +17
We present new photometric observations for twelve asteroids ((122) Gerda, (152) Atala, (260) Huberta, (665) Sabine, (692) Hippodamia, (723) Hammonia, (745) Mauritia, (768) Struvea…
Flare Induced Photospheric Velocity Diagnostics
Aaron J. Monson, Mihalis Mathioudakis, Aaron Reid +2
We present radiative hydrodynamic simulations of solar flares generated by the RADYN and RH codes to study the perturbations induced in photospheric Fe I lines by electron beam hea…
Rapid Modification of Neutron Star Surface Magnetic Field: A proposed mechanism for explaining Radio Emission State Changes in Pulsars
U. Geppert, R. Basu, D. Mitra +2
The radio emission in many pulsars show sudden changes, usually within a period, that cannot be related to the steady state processes within the inner acceleration region (IAR) abo…
The complex variability of blazars: Time-scales and periodicity analysis in S4 0954+65
C. M. Raiteri, M. Villata, V. M. Larionov +3
Among active galactic nuclei, blazars show extreme variability properties. We here investigate the case of the BL Lac object S4 0954+65 with data acquired in 2019-2020 by the Trans…
Numerical simulations of macrospicule jets under energy imbalance conditions in the solar atmosphere
J. J. González-Avilés, K. Murawski, A. K. Srivastava +2
Using numerical simulations, we study the effects of thermal conduction and radiative cooling on the formation and evolution of solar jets with some macrospicules features. We init…
Aerodynamic sound of turbulent time-developing shear layer as the outcome of the flow linear non-modal instability
George Khujadze, David Gogichaishvili, George Chagelishvili +3
The aim of this paper is to substantiate the importance of non-normality of shear flow linear operators and its consequence -- the non-modal dynamics of the perturbations -- in the…
Solitary structure formation and self-guiding of electromagnetic beam in highly degenerate electron plasma
V. I. Berezhiani, Z. N. Osmanov, S. M. Mahajan +1
In the present paper we consider the nonlinear interaction of high frequency intense electromagnetic (EM) beam with degenerate electron plasmas. In a slowly varying envelop approxi…
Magnetic field inference in active region coronal loops using coronal rain clumps
M. Kriginsky, R. Oliver, P. Antolin +2
Aims. We aim to infer information about the magnetic field in the low solar corona from coronal rain clumps using high-resolution spectropolarimetric observations in the Ca ii 8542…
Chromospheric Heating by MHD Waves and Instabilities
A. K. Srivastava, J. L. Ballester, P. S. Cally +7
The importance of the chromosphere in the mass and energy transport within the solar atmosphere is now widely recognised. This review discusses the physics of magnetohydrodynamic (…