134 citations · 475 across the 18 of their papers we have counts for
13 papers · 1 filter
Parsec-scale evolution of the gigahertz-peaked spectrum quasar PKS 0858-279
N. A. Kosogorov, Y. Y. Kovalev, M. Perucho +1
We conducted multi-epoch, multi-frequency parsec-scale studies on the gigahertz-peaked spectrum quasar PKS 0858-279 with the Very Long Baseline Array (VLBA). Our observations on 20…
Properties of the jet in M87 revealed by its helical structure imaged with the VLBA at 8 and 15 GHz
A. S. Nikonov, Y. Y. Kovalev, E. V. Kravchenko +2
We present full-track high-resolution radio observations of the jet of the galaxy M87 at 8 and 15 GHz. These observations were taken over three consecutive days in May 2009 using t…
RadioAstron Space VLBI Imaging of the jet in M87: I. Detection of high brightness temperature at 22 GHz
Jae-Young Kim, Tuomas Savolainen, Petr Voitsik +19
We present results from the first 22 GHz space very-long-baseline interferometric (VLBI) imaging observations of M87 by RadioAstron. As a part of the Nearby AGN Key Science Program…
Tracing Milky Way scattering by compact extragalactic radio sources
T. A. Koryukova, A. B. Pushkarev, A. V. Plavin +1
We used archival very long baseline interferometry (VLBI) data of active galactic nuclei (AGN) observed from 1.4 GHz to 86 GHz to measure the angular size of VLBI radio cores in 89…
First Space-VLBI Observations of Sagittarius A*
Michael D. Johnson, Yuri Y. Kovalev, Mikhail M. Lisakov +3
We report results from the first Earth-space VLBI observations of the Galactic Center supermassive black hole, Sgr A*. These observations used the space telescope Spektr-R of the R…
Polarimetric properties of Event Horizon Telescope targets from ALMA
Ciriaco Goddi, Ivan Marti-Vidal, Hugo Messias +31
We present the results from a full polarization study carried out with ALMA during the first VLBI campaign, which was conducted in Apr 2017 in the 3mm and 1.3mm bands, in con…