149 citations · 1.4k across the 59 of their papers we have counts for
4 papers · 2 filters
Significant core shift variability in parsec-scale jets of active galactic nuclei
A. V. Plavin, Y. Y. Kovalev, A. B. Pushkarev +1
The apparent position of jet base (core) in radio-loud active galactic nuclei changes with frequency because of synchrotron self-absorption. Studying this `core shift` effect enabl…
Frequency-Dependent Core Shifts in Ultracompact Quasars
P. A. Voitsik, A. B. Pushkarev, Y. Y. Kovalev +3
Results of a pilot project with the participation of the "Kvazar-KVO" radio interferometry array in observations carried out with the European VLBI Network are presented. The aim o…
Dissecting the AGN disk-jet system with joint VLBI-Gaia analysis
A. V. Plavin, Y. Y. Kovalev, L. Petrov
We analyze differences in positions of active galactic nuclei between Gaia data release 2 and VLBI and compare the significant VLBI-to-Gaia offsets in more than 1000 objects with t…
A quantitative analysis of systematic differences in positions and proper motions of Gaia DR2 with respect to VLBI
L. Petrov, Y. Y. Kovalev, A. V. Plavin
We have analyzed the differences in positions of 9081 matched sources between the Gaia DR2 and VLBI catalogues. The median position uncertainty of matched sources in the VLBI catal…