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
14 papers · 1 filter
Observational Constraints on Dynamical Dark Energy Models
Olga Avsajanishvili, Gennady Y. Chitov, Tina Kahniashvili +2
CDM models provide an alternative to the standard CDM paradigm, while being physically better motivated. These models lead to a time-dependent speed of sound for dark energy…
MRI turbulence in vertically stratified accretion discs at large magnetic Prandtl numbers
Loren E. Held, George Mamatsashvili, Martin E. Pessah
The discovery of the first binary neutron star merger, GW170817, has spawned a plethora of global numerical relativity simulations. These simulations are often ideal (with dissipat…
Chromatic Afterglow of GRB 200829A
N. S. Pankov, A. S. Pozanenko, P. Yu. Minaev +16
We present the results of our analysis of multiwavelength observations for the long gamma-ray burst GRB 200829A. The burst redshift has been determined ph…
Mixing Bispectrum Multipoles Under Geometric Distortions
Giorgi Khomeriki, Lado Samushia
We derive general expressions for how the Alcock-Paczynski distortions affect the power spectrum and the bispectrum of cosmological fields. We compute explicit formulas for the mix…
Relic Gravitational Waves from the Chiral Plasma Instability in the Standard Cosmological Model
Axel Brandenburg, Emma Clarke, Tina Kahniashvili +2
In the primordial plasma, at temperatures above the scale of electroweak symmetry breaking, the presence of chiral asymmetries is expected to induce the development of helical hype…
SALT spectroscopy of the HMXB associated with the LMC supernova remnant MCSNR\,J05136724
Vasilii Gvaramadze, Alexei Kniazev, Norberto Castro +1
We report the results of optical échelle spectroscopy with the Southern African Large Telescope (SALT) of the mass donor star BSDL\,923 in the neutron star (NS) high-mass X-ray bin…
Meterwavelength Single-pulse Polarimetric Emission Survey. VI. Towards understanding the Phenomenon of Pulsar Polarization in Partially Screened Vacuum Gap model
Dipanjan Mitra, George I. Melikidze, Rahul Basu
We have observed 123 pulsars with periods longer than 0.1 seconds in the Meterwavelength Single-pulse Polarimetric Emission Survey. In this work a detailed study of polarization be…
The Early Data Release of the Dark Energy Spectroscopic Instrument
DESI Collaboration, A. G. Adame, J. Aguilar +266
The Dark Energy Spectroscopic Instrument (DESI) completed its five-month Survey Validation in May 2021. Spectra of stellar and extragalactic targets from Survey Validation constitu…
GRANDMA and HXMT Observations of GRB 221009A -- the Standard-Luminosity Afterglow of a Hyper-Luminous Gamma-Ray Burst
D. A. Kann, S. Agayeva, V. Aivazyan +113
GRB 221009A is the brightest Gamma-Ray Burst (GRB) detected in more than 50 years of study. In this paper, we present observations in the X-ray and optical domains after the GRB ob…
Estimating the evolution of Sparks in Partially Screened Gap of Pulsars from Subpulse Drifting
Rahul Basu, Dipanjan Mitra, George I. Melikidze
A novel scheme has been developed to show that the observed phase behaviour associated with subpulse drifting from two pulsars, J10343224 and J17202933, can be used to obtain…
The optical behaviour of BL Lacertae at its maximum brightness levels: a blend of geometry and energetics
C. M. Raiteri, M. Villata, S. G. Jorstad +13
In 2021 BL Lacertae underwent an extraordinary activity phase, which was intensively followed by the Whole Earth Blazar Telescope (WEBT) Collaboration. We present the WEBT optical…
Evidence for Coherent Curvature Radiation in PSR J16450317 with Disordered Distribution of Polarization Position Angle
Dipanjan Mitra, George I. Melikidze, Rahul Basu
The diverse polarization properties in pulsars are in conflict with applying a unique emission mechanism to the population. The polarization position angle (PPA) traverse in most p…
Temperature diagnostics of chromospheric fibrils
M. Kriginsky, R. Oliver, D. Kuridze
Context. Chromospheric fibrils are thin and elongated structures that connect nearby photospheric magnetic field concentrations of opposite polarities. Aims. We assess the possibil…
Rossby waves on stellar equatorial beta-planes: uniformly rotating radiative stars
M. Albekioni, T. V. Zaqarashvili, V. Kukhianidze
Rossby waves arise due to the conservation of total vorticity in rotating fluids and may govern the large-scale dynamics of stellar interiors. Recent space missions collected huge…