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
25 papers · 1 filter
Two Modes of Partially Screened Gap
Andrzej Szary, George Melikidze, Janusz Gil
The analysis of X-ray observations suggest an ultrastrong () surface magnetic field at the polar cap of pulsars (Szary, 2013). On the other hand, the te…
On the Origin of Radio Emission from Magnetars
Andrzej Szary, George I. Melikidze, Janusz Gil
Magnetars are the most magnetized objects in the known universe. Powered by the magnetic energy, and not by the rotational energy as in the case of radio pulsars, they have long be…
Cosmic Expansion in Extended Quasidilaton Massive Gravity
Tina Kahniashvili, Arjun Kar, George Lavrelashvili +3
Quasidilaton massive gravity offers a physically well-defined gravitational theory with non-zero graviton mass. We present the full set of dynamical equations governing the expansi…
Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
The MAGIC Collaboration, J. Aleksić, S. Ansoldi +251
A flare from the TeV blazar Mrk 421, occurring in March 2010, was observed for 13 consecutive days from radio to very high energy (VHE, E > 100 GeV) gamma-rays with MAGIC, VERITAS,…
Kelvin-Helmholtz instability on coronal mass ejecta in the lower corona
I. Zhelyazkov, T. V. Zaqarashvili, R. Chandra
We model an imaged Kelvin-Helmholtz (KH) instability on a coronal mass ejecta (CME) in the lower corona by investigating conditions under which kink () and magnetoh…
Overdamped Alfven waves due to ion-neutral collisions in the solar chromosphere
R. Soler, J. L. Ballester, T. V. Zaqarashvili
Alfvenic waves are ubiquitous in the solar atmosphere and their dissipation may play an important role in atmospheric heating. In the partially ionized solar chromosphere, collisio…
Cosmological implications of baryon acoustic oscillation (BAO) measurements
Éric Aubourg, Stephen Bailey, Julian E. Bautista +90
We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave backgr…
Multiwavelength observations of Mrk 501 in 2008
MAGIC Collaboration, J. Aleksić, S. Ansoldi +256
Mrk 501 is one of the brightest blazars at TeV energies and has been extensively studied since its first VHE detection in 1996. Our goal is to characterize in detail the source gam…
Nonlinear transverse cascade and two-dimensional magnetohydrodynamic subcritical turbulence in plane shear flows
G. R. Mamatsashvili, D. Z. Gogichaishvili, G. D. Chagelishvili +1
We find and investigate via numerical simulations self-sustained two-dimensional turbulence in a magnetohydrodynamic flow with a maximally simple configuration: plane, noninflectio…
On the adiabatic walking of plasma waves in a pulsar magnetosphere
George I. Melikidze, Dipanjan Mitra, Janusz Gil
The pulsar radio emission is generated in the near magnetosphere of the neutron star and it has to propagate through the rest of it to emerge into the interstellar medium. An impor…
The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
Ashley J. Ross, Lado Samushia, Cullan Howlett +3
We create a sample of spectroscopically identified galaxies with from the Sloan Digital Sky Survey (SDSS) Data Release 7, covering 6813 deg. Galaxies are chosen to sa…
The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at
Cullan Howlett, Ashley J. Ross, Lado Samushia +2
We measure Redshift-Space Distortions (RSD) in the two-point correlation function of a sample of spectroscopically identified galaxies with , an epoch where there…
Tests of redshift-space distortions models in configuration space for the analysis of the BOSS final data release
Martin White, Beth Reid, Chia-Hsun Chuang +4
Observations of redshift-space distortions in spectroscopic galaxy surveys offer an attractive method for observing the build-up of cosmological structure, which depends both on th…
Primordial Magnetic Helicity Constraints from WMAP Nine-Year Data
Tina Kahniashvili, Yurii Maravin, George Lavrelashvili +1
If a primordial magnetic field in the universe has non-zero helicity, the violation of parity symmetry results in non-zero correlations between cosmic microwave background temperat…
Overstability of acoustic waves in strongly magnetized anisotropic MHD shear flows
E. S. Uchava, B. M. Shergelashvili, A. G. Tevzadze +1
We present a linear stability analysis of the perturbation modes in anisotropic MHD flows with velocity shear and strong magnetic field. Collisionless or weakly collisional plasma…
The binary near-Earth asteroid (175706) 1996 FG3 - An observational constraint on its orbital evolution
P. Scheirich, P. Pravec, S. A. Jacobson +23
Using our photometric observations taken between 1996 and 2013 and other published data, we derived properties of the binary near-Earth asteroid (175706) 1996 FG3 including new mea…
Growth Rate in the Dynamical Dark Energy Models
Olga Avsajanishvili, Natalia A. Arkhipova, Lado Samushia +1
Dark Energy models with slowly-rolling cosmological scalar field provide a popular alternative to the standard, time-independent cosmological constant model. We study simultaneous…
Nonhelical inverse transfer of a decaying turbulent magnetic field
Axel Brandenburg, Tina Kahniashvili, Alexander G. Tevzadze
In the presence of magnetic helicity, inverse transfer from small to large scales is well known in magnetohydrodynamic (MHD) turbulence and has applications in astrophysics, cosmol…
Nature and dynamics of overreflection of Alfven waves in MHD shear flows
D. Gogichaishvili, G. Chagelishvili, R. Chanishvili +1
Our goal is to gain new insights into the physics of wave overreflection phenomenon in MHD nonuniform/shear flows changing the existing trend/approach of the phenomenon study. The…
Fast magnetohydrodynamic oscillation of longitudinally inhomogeneous prominence threads: an analogue with quantum harmonic oscillator
S. N. Lomineishvili, T. V. Zaqarashvili, I. Zhelyazkov +1
Previous works indicate that the frequency ratio of second and first harmonics of kink oscillations has tendency towards 3 in the case of prominence threads. We aim to study the ma…
Multifrequency Studies of the Peculiar Quasar 4C +21.35 During the 2010 Flaring Activity
M. Ackermann, M. Ajello, A. Allafort +288
The discovery of rapidly variable Very High Energy (VHE; E > 100 GeV) gamma-ray emission from 4C +21.35 (PKS 1222+216) by MAGIC on 2010 June 17, triggered by the high activity dete…
Twisted magnetic flux tubes in the solar wind
Teimuraz Zaqarashvili, Zoltán Vörös, Yasuhito Narita +1
Magnetic flux tubes in the solar wind can be twisted as they are transported from the solar surface, where the tubes are twisted owing to photospheric motions. It is suggested that…
Radio efficiency of pulsars
Andrzej Szary, Bing Zhang, George Melikidze +2
We investigate radio emission efficiency of pulsars and report a near linear inverse correlation between and the spindown power , as well as a near linear correlati…
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: mock galaxy catalogues for the low-redshift sample
Marc Manera, Lado Samushia, Rita Tojeiro +7
We present one thousand mock galaxy catalogues for the analysis of the Low Redshift Sample (LOWZ, effective redshift z ~ 10.32) of the Baryon Oscillation Spectroscopic Survey Data…