Научные результаты

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. Читать далее →

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. Читать далее →

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. Читать далее →

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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. Читать далее →

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.  Читать далее →

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. Читать далее →

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.  Читать далее →

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

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.  Читать далее →

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).  Читать далее →

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. Читать далее →

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. Читать далее →

The recent BRONZE neutrino alert IceCube-220225, GCN #31650, with an energy of 154 TeV is suggested to be associated with the radio-bright blazar PKS 0215+015 following the predictions of Plavin et al. (2020) analysis.  Читать далее →

The recent GOLD neutrino alert IceCube-220205, GCN #31554, with an energy above 200 TeV is suggested to be associated with the blazar PKS 1741-03.  Читать далее →

Quasiperiodic pulsations (QPPs) are frequently observed in the entire range of the electromagnetic spectrum during solar flares, and there can be many possible mechanisms leading to this phenomenon. In the present work, we demonstrate the possibility of the generation of QPPs by a nonlinear fast sausage mode in a coronal loop.  Читать далее →

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 objects) without detected maser emission.  Читать далее →

During the long-term multi-frequency monitoring of the Galactic microquasars with the RATAN-600 radio telescope we have detected the giant flare at 1.2-30 GHz from the microquasar Cygnus X-3 on 31 August 2021 (ATel #14281). Читать далее →

We present the results of our study of the relationship between Fanaroff-Riley type 0 (FR0) radio galaxies and gigahertz-peaked spectrum (GPS) sources. Читать далее →

We report the radio continuum properties for several samples of peaked spectrum (PS) radio sources. Читать далее →

We present the radio properties of optically selected quasars with z ≥ 3. The complete sample consists of 102 quasars with a flux density level S1.4 ≥ 100 mJy in a declination range -35° ≤ Dec. ≤ +49°. Читать далее →