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
20 papers · 1 filter
AGILE, Fermi, Swift, and GASP-WEBT multi-wavelength observations of the high-redshift blazar 4C 71.07 in outburst
S. Vercellone, P. Romano, G. Piano +56
The flat-spectrum radio quasar 4C 71.07 is a high-redshift (), -loud blazar whose optical emission is dominated by the thermal radiation from accretion disc. 4C 7…
Magnetism in the Early Universe
Tina Kahniashvili, Axel Brandenburg, Arthur Kosowsky +2
Blazar observations point toward the possible presence of magnetic fields over intergalactic scales of the order of up to Mpc, with strengths of at least G…
Classification of Subpulse Drifting in Pulsars
Rahul Basu, Dipanjan Mitra, George I. Melikidze +1
In this study we propose a classification scheme for the phenomenon of subpulse drifting in pulsars. We have assembled an exhaustive list of pulsars which exhibit subpulse drifting…
Alfvén Wave Dissipation in the Solar Chromosphere
S. D. T. Grant, D. B. Jess, T. V. Zaqarashvili +7
Magneto-hydrodynamic (MHD) Alfvén waves have been a focus of laboratory plasma physics and astrophysics for over half a century. Their unique nature makes them ideal energy transpo…
The extreme HBL behaviour of Markarian 501 during 2012
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +276
A multiwavelength campaign was organized to take place between March and July of 2012. Excellent temporal coverage was obtained with more than 25 instruments, including the MAGIC,…
Relativistic charge solitons created due to nonlinear Landau damping: A candidate for explaining coherent radio emission in pulsars
Taras Lakoba, Dipanjan Mitra, George Melikidze
A potential resolution for the generation of coherent radio emission in pulsar plasma is the existence of relativistic charge solitons, which are solutions of nonlinear Schrödinger…
Active modes and dynamical balances in MRI-turbulence of Keplerian disks with a net vertical magnetic field
D. Gogichaishvili, G. Mamatsashvili, W. Horton +1
We studied dynamical balances in magnetorotational instability (MRI) turbulence with a net vertical field in the shearing box model of disks. Analyzing the turbulence dynamics in F…
Association between Tornadoes and Instability of Hosting Prominence
Irakli Mghebrishvili, Teimuraz V. Zaqarashvili, Vasil Kukhianidze +4
We studied the dynamics of all prominence tornadoes detected by the Solar Dynamics Observatory/Atmospheric Imaging Assembly from 2011 January 01 to December 31. In total, 361 event…
E and B polarizations from inhomogeneous and solar surface turbulence
Axel Brandenburg, Andrea Bracco, Tina Kahniashvili +4
Gradient- and curl-type or E- and B-type polarizations have been routinely analyzed to study the physics contributing to the cosmic microwave background polarization and galactic f…
The timestep constraint in solving the gravitational wave equations sourced by hydromagnetic turbulence
A. Roper Pol, A. Brandenburg, T. Kahniashvili +2
Hydromagnetic turbulence produced during phase transitions in the early universe can be a powerful source of stochastic gravitational waves (GWs). GWs can be modelled by the linear…
Periodicity in the Light Curve of P Cygni - Indication for a Binary Companion?
Amir M. Michaelis, Amit Kashi, Nino Kochiashvili
We use observations of the Luminous Blue Variable (LBV) P Cygni spanning seven decades, along with signal processing methods, to identify a periodicity in the stellar luminosity. W…
A map-based method for eliminating systematic modes from galaxy clustering power spectra with application to BOSS
B. Bahr-Kalus, W. J. Percival, D. J. Bacon +5
We develop a practical methodology to remove modes from a galaxy survey power spectrum that are associated with systematic errors. We apply this to the BOSS CMASS sample, to see if…
Spectropolarimetric inversions of the Ca ii 8542 Å line in a M-class solar flare
D. Kuridze, V. Henriques, M. Mathioudakis +3
We study the M1.9 class solar flare SOL2015-09-27T10:40 UT using high-resolution full-Stokes imaging spectropolarimetry of the Ca ii 8542 Å line obtained with the CRISP imaging spe…
Flaring radio lanterns along the ridge line: long-term oscillatory motion in the jet of S5 1803+784
E. Kun, M. Karouzos, K. É. Gabányi +3
We present a detailed analysis of 30 very long baseline interferometric observations of the BL Lac object S5 1803+784 (z=0.679), obtained between mean observational time 1994.67 an…
Statistical Properties of Scale-Invariant Helical Magnetic Fields and Applications to Cosmology
Axel Brandenburg, Ruth Durrer, Tina Kahniashvili +2
We investigate the statistical properties of isotropic, stochastic, Gaussian distributed, helical magnetic fields characterized by different shapes of the energy spectra at large l…
The ever-surprising blazar OJ 287: multi-wavelength study and appearance of a new component in X-rays
Pankaj Kushwaha, Alok C. Gupta, Paul J. Wiita +21
We present a multi-wavelength spectral and temporal investigation of OJ 287 emission during its strong optical-to-X-ray activity between July 2016 - July 2017. The daily -ray fl…
Characterizing optical variability of OJ 287 in 2016 - 2017
Alok C. Gupta, Haritma Gaur, Paul J. Wiita +22
We report on a recent multi-band optical photometric and polarimetric observational campaign of the blazar OJ 287 which was carried out during September 2016 -- December 2017. We e…
Evidence for precursors of the coronal hole jets in solar bright points
Salome R. Bagashvili, Bidzina M. Shergelashvili, Darejan R. Japaridze +5
A set of 23 observations of coronal jet events that occurred in coronal bright points has been analyzed. The focus was on the temporal evolution of the mean brightness before and d…
Equatorial magnetohydrodynamic shallow water waves in the solar tachocline
T. V. Zaqarashvili
The influence of a toroidal magnetic field on the dynamics of shallow water waves in the solar tachocline is studied. A sub-adiabatic temperature gradient in the upper overshoot la…
Meterwavelength Single-pulse Polarimetric Emission Survey IV: The Period Dependence of Component Widths of Pulsars
Anna Skrzypczak, Rahul Basu, Dipanjan Mitra +4
The core component width in normal pulsars, with periods () 0.1 seconds, measured at the half-power point at 1 GHz has a lower boundary line (LBL) which closely follows the…