31 citations · 274 across the 34 of their papers we have counts for
34 papers
A broadband outburst of the compact steep-spectrum quasar 3C 138 in 2024-2026
T. V. Mufakharov, Yu. V. Sotnikova, V. V. Vlasyuk +20
After several decades of relative quiescence, the compact steep-spectrum quasar 3C 138 entered an active phase in 2024-2026, exhibiting strong broadband flaring. We investigate its…
Multiwavelength variability of the high-energy neutrino candidate PKS 0735+178 over three decades
T. Mufakharov, Yu. Sotnikova, V. Vlasyuk +12
We present the multiwavelength variability of the BL Lac object PKS 0735+178, associated with the high-energy neutrino event IC211208A. The light curves cover the radio (1-230 GHz)…
Discovery of Unusual Jet Orientation Variations in the Microquasar GRS 1915+105
Xi Yan, Lang Cui, Wu Jiang +6
We report large day-timescale variations in the orientation of the southeast--northwest jet in the prototype microquasar GRS 1915+105. These results are based on three-epoch East A…
Multiwavelength quasi-periodic variability of the blazar Ton 599
Yu. V. Sotnikova, T. V. Mufakharov, A. E. Volvach +34
During the last 40-50 years, the TeV blazar Ton 599 has systematically experienced major outbursts detected in a wide wavelength range from radio to -rays. In this work, we pres…
High-redshift quasars at -- III. Parsec-scale jet properties from VLBI observations
Shaoguang Guo, Tao An, Yuanqi Liu +5
High redshift active galactic nuclei (AGN) provide key insights into early supermassive black hole growth and cosmic evolution. This study investigates the parsec-scale properties…
Radio and Optical Properties of the blazar PKS 1614+051 at z=3.21
Yu. V. Sotnikova, A. G. Mikhailov, A. E. Volvach +21
We present a study of the radio and optical properties of the high-frequency peaker (HFP) blazar PKS 1614+051 at based on the data covering the time period of 1997-2024. T…
Multiwavelength variability of the blazar AO 0235+164
V. V. Vlasyuk, Yu. V. Sotnikova, A. E. Volvach +28
We present a study of the multiwavelength (MW) variability of the blazar AO 0235+164 based on the radio-to--ray data covering a long time period from 1997 to 2023. The radio dat…
A wiggling filamentary jet at the origin of the blazar multi-wavelength behaviour
C. M. Raiteri, M. Villata, M. I. Carnerero +96
Blazars are beamed active galactic nuclei known for their strong multi-wavelength variability on timescales from years down to minutes. We aim to investigate the suitability of the…
High-redshift quasars at : radio variability and MPS/GPS candidates
Yu. Sotnikova, A. Mikhailov, T. Mufakharov +7
We present a study of the radio variability of bright, mJy, high-redshift quasars at on timescales up to 30-40 years. The study involved simultaneous RATA…
Magnetically Driven Relativistic Jet in the High-Redshift Blazar OH~471
S. Guo, T. An, Y. Liu +15
Context : Understanding the mechanisms that launch and shape powerful relativistic jets from supermassive black holes (SMBHs) in high-redshift active galactic nuclei (AGN) is cruci…
Cluster analysis of the Roma-BZCAT blazars
D. O. Kudryavtsev, Yu. V. Sotnikova, V. A. Stolyarov +5
Based on the collected multiwavelength data, namely in the radio (NVSS, FIRST, RATAN-600), IR (WISE), optical (Pan-STARRS), UV (GALEX), and X-ray (ROSAT, Swift-XRT) ranges, we have…
GMRT observations of OHM candidates from the ALFALFA survey
Shouzhi Wang, Zhongzu Wu, Bo Zhang +5
We present the results of our observations using the Giant Meterwave Radio Telescope (GMRT) to investigate the radio continuum and OH line emission of 10 OHM candidates from the Ar…
VLBI observations of the high-redshift X-ray bright blazar SRGE J170245.3+130104
Yuanqi Liu, Tao An, Shaoguang Guo +8
Aims. The X-ray luminous and radio-loud AGN SRGE J170245.3+130104 discovered at z 5.5 provides unique chances to probe the SMBH growth and evolution with powerful jets in th…
Radio properties of high-redshift galaxies at
M. Khabibullina, A. Mikhailov, Yu. Sotnikova +6
Study of high-redshift radio galaxies (HzRGs) can shed light on the active galactic nuclei (AGNs) evolution in massive elliptical galaxies. The vast majority of observed high-redsh…
Optical and Radio Variability of the Blazar S4 0954+658
V. V. Vlasyuk, Yu. V. Sotnikova, A. E. Volvach +23
We present an optical-to-radio study of the BL Lac object S4 0954+658 observations during 1998-2023. The measurements were obtained with the SAO RAS Zeiss-1000 1-m and AS-500/2 0.5…
Multi-band Cross-correlated Radio Variability of the Blazar 3C 279
Krishna Mohana A, Alok C. Gupta, Alan P. Marscher +18
We present the results of our study of cross-correlations between long-term multi-band observations of the radio variability of the blazar 3C 279. More than a decade (2008-2022) of…
Is the X-ray bright z = 5.5 quasar SRGE J170245.3+130104 a blazar?
Tao An, Ailing Wang, Yuanqi Liu +11
Jets may have contributed to promoting the growth of seed black holes in the early Universe, and thus observations of radio-loud high-redshift quasars are crucial to understanding…
Radio continuum and OH line emission of high-z OH megamaser galaxies
Zhongzu Wu, Yu. V. Sotnikova, Bo Zhang +8
We present the study of arcsecond scale radio continuum and OH line emission of a sample of known OH megamaser galaxies with 0.15 using archival Very Large Array (VLA) dat…
The RATAN-600 multi-frequency catalogue of blazars -- BLcat
Yu. Sotnikova, T. Mufakharov, R. Udovitskiy +6
In this paper we present the RATAN-600 multi-frequency catalogue of blazars, an updated version of the BLcat: the RATAN-600 multi-frequency catalogue of BL Lacertae objects. The ma…
Radio Variability and Broad-Band Spectra of Infrared Galaxies with and without OH Megamaser Emission
Yu. V. Sotnikova, T. V. Mufakharov, A. G. Mikhailov +7
We study the radio variability of galaxies with and without sources of hydroxyl (OH) megamaser radiation based on the continuum radio measurements conducted in 2019-2022 with the r…
Radio properties of the OH megamaser galaxy IIZw 096
Hong Wu, Zhongzu Wu, Yu. Sotnikova +9
Based on the two epochs EVN archive data from OH line observations of IIZw 096, we confirm that the high-resolution OH emission in this source mainly comes from two spots (OH1 and…
Radio continuum properties of OH megamaser galaxies
Yu. V. Sotnikova, Z. Z. Wu, T. V. Mufakharov +13
We present a study of the radio continuum properties of two luminous/ultraluminous infrared galaxy samples: the OH megamaser (OHM) sample (74 objects) and the control sample (128 o…
Multifrequency study of gigahertz-peaked spectrum sources with RATAN-600
Yu. Sotnikova, T. Mufakharov, M. Mingaliev +1
We report the radio continuum properties for several samples of peaked spectrum (PS) radio sources. Broadband spectra of the objects were analysed using the RATAN-600 six-frequency…
High-redshift quasars at -- I. Radio spectra
Yu. Sotnikova, A. Mikhailov, T. Mufakharov +7
We present the radio properties of optically selected quasars with . The complete sample consists of 102 quasars with a flux density level mJy in a declina…