Scientific results

We report the historical high flux density level of the flat-spectrum radio quasar Ton 599 (4C +29.45) at 1.2-36.8 GHz. read more →

Modern studies of solar radio emission are complicated by continuous power amplification and multifrequency external interference, which often completely overlap important frequency ranges. read more →

The transition from the large-amplitude rapidly-decaying regime of kink oscillations of plasma loops observed in the corona of the Sun to the low-amplitude decayless oscillations is modelled.  read more →

We study the observed response of microwave radiation to the perturbation of a transversely inhomogeneous plasma slab, which is stretched along a uniform magnetic field, by a symmetric (sausage-mode) fast magnetosonic wave guided by the slab. read more →

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 the growth and evolution of the early supermassive black holes. read more →

We present a study of the arcsecond-scale radio continuum and OH line emission of a sample of known OH megamaser (OHM) galaxies with z ≥ 0.15 using archival Very Large Array (VLA) data and also the results of our pilot Five-hundred-meter Aperture Spherical radio Telescope (FAST) observations of 12 of these OHM galaxies.  read more →

We present three new design solutions—centimeter-band radiometric units and the design of each radio unit. We demonstrate the development of an uncooled tuned receiver based on this unit which is meant for operating in the total-power radiometer mode. read more →

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. read more →

The modulation of the microwave emission intensity from a flaring loop by a standing linear sausage fast magnetoacoustic wave is considered in terms of a straight plasma slab with the perpendicular Epstein profile of the plasma density, penetrated by a magnetic field. read more →

We used the RT-22 Simeiz radio telescope (Volvach et al., A & A 648, A27, 2021) to observe GRB221009A at 22.2 and 36.8 GHz. The observations were carried out on October 11th and 14th, 2022. read more →

Up to now, jet kinematic studies of radio quasars have barely reached beyond the redshift range z > 3.5. This significantly limits our knowledge of high-redshift jets, which can provide key information for understanding the jet nature and the growth of black holes in the early universe. read more →

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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 radio telescope RATAN-600 at frequencies of 2.3, 4.7, 8.2, and 11.2 GHz. read more →

The Square Kilometre Array (SKA) is the largest radio interferometer under construction in the world. The high accuracy, wide-field, and large size imaging significantly challenge the construction of the Science Data Processor (SDP) of SKA.  read more →

We present an analysis of the X-ray data obtained in the period of flaring activity of SS 433 in July and August 2018, during which the brightest radio flares over the entire history of its observations were detected at frequencies 2-5 GHz based on data from the RATAN-600 radio telescope. read more →

We investigate the statistical properties of radio sources from the WENSS catalog, in the direction to which the Sunyaev-Zeldovich (SZ) effect is detected in the multifrequency microwave maps of the Planck space mission.  read more →

The Hubble diagram (HD) is a plot that contains a luminous distance modulus presented with respect to the redshift. read more →

The observed characteristics of the spectral and photometric variability of SS 433 are discussed based on the data for 2018-2021 and compared with earlier results.  read more →

The arrival direction of the recently detected high-energy (~604 TeV) neutrino, IceCube GOLD alert 220425A (GCN #31944), coincides with the blazar TXS 1749-101. This blazar was previously selected as an association for another high-energy neutrino event, IceCube EHE alert 181023A (GCN #23375), by Plavin et al. (2020).  read more →

The study of the relationship of positive fluctuations on Planck frequency maps with the nearest radio sources of the RCR catalog (RATAN Cold Refined) was continued. read more →

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 OH2) of comp D1 of this merging system. We found no significant variations in the OH line emission. read more →