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The modulation of the intensity of microwave emission from a plasma slab caused by a standing linear kink fast magnetoacoustic wave is considered. Читать далее →
We report the historical high flux density level for the blazar of unknown type MG2 J144640+3110 at 5-22 GHz.Simultaneous radio spectrum of MG2 J144640+3110 after its gamma-ray activity Читать далее →
We present the measurement results for the spectral flux densities of 19 calibration sources observed with the RT-22 single-dish telescope of the Crimean Astrophysical Observatory of the Russian Academy of Sciences at 22.2 and 36.8 GHz in 2017-2020. Читать далее →
How black holes consume and eject matter has been the subject of intense studies for more than 60 years.  Читать далее →
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. Читать далее →
Modern studies of solar radio emission are complicated by continuous power amplification and multifrequency external interference, which often completely overlap important frequency ranges. Читать далее →
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.  Читать далее →
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. Читать далее →
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. Читать далее →
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.  Читать далее →
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. Читать далее →
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 →
The existence of high-energy astrophysical neutrinos has been unambiguously demonstrated, but their sources remain elusive. IceCube reported an association of a 290-TeV neutrino with a gamma-ray flare of TXS 0506+056, an active galactic nucleus with a compact radio jet pointing to us. Читать далее →
We study the broadband emission of the TeV blazar Mrk501 using multi-wavelength (MWL) observations from 2017 to 2020 performed with a multitude of instruments, involving, among others, MAGIC, Fermi-LAT, NuSTAR, Swift, GASP-WEBT, and OVRO. 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 →
Aims: We investigate the dynamics of spectra of Langmuir waves in the plasma radiation of solar radio bursts.
Methods: We simulated the radio emission that is formed during the merging of Langmuir waves.
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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 →
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