Proton jets as sources of high-energy neutrinos and variable radio emission based on the RATAN-600 and CATS data at 0.01–1000 GHz

Yuriy Kovalev; Nikolay Nizhel&#039;skiy; Yury Kovalev; Yulya Sotnikova; Sergey Troitsky; Semen Pustil&#039;nik; Alexander Popkov; Alexander Plavin; Artur Erkenov; Peter Tsybulev; Gennady Zhekanis; Anastasya Kudryashova; Nikolay Bursov

doi:doi:10.26119/2025-moc05

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Proton jets as sources of high-energy neutrinos and variable radio emission based on the RATAN-600 and CATS data at 0.01–1000 GHz

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PROTON JETS AS SOURCES OF HIGH-ENERGY NEUTRINOS AND VARIABLE RADIO EMISSION BASED ON THE RATAN-600 AND CATS DATA AT 0.01–1000 GHZ

Section: ORIGINAL ARTICLES

Proceedings: «MODERN OBSERVATIONAL COSMOLOGY» DEDICATED TO THE 60TH ANNIVERSARY OF O.V. VERKHODANOV

VAK Russia 1.3.1

UDC 524.7 UDC 524.7-7 UDC 524.7-1/-8

CSCSTI 41.27 CSCSTI 41.51 CSCSTI 41.29

Russian Classification of Professions by Education 03.05.01 Russian Classification of Professions by Education 03.06.01

Russian Library and Bibliographic Classification 223

Russian Trade and Bibliographic Classification 6143

BISAC SCI004000 Astronomy BISAC SCI005000 Physics / Astrophysics

Yuriy Kovalev ¹

Nikolay Nizhel'skiy ²

Yury Kovalev ³

Yulya Sotnikova ⁴

Sergey Troitsky ⁵

Semen Pustil'nik ⁶

Alexander Popkov ⁷

Alexander Plavin ⁸

Artur Erkenov ⁹

Peter Tsybulev ¹⁰

Gennady Zhekanis ¹¹

Anastasya Kudryashova ¹²

Nikolay Bursov ¹³

Author and publication information

Authors:

1. Lebedev Physical Institute of the Russian Academy of Sciences
Institute for Nuclear Research of the Russian Academy of Sciences
Russian Federation

2. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

3. Max-Plank-Institute fur RadioAstronomie
Russian Federation

4. Special Astrophysical Observatory of the Russian Academy of Sciences
Institute for Nuclear Research of the Russian Academy of Sciences
Special Astrophysical Observatory of the Russian Academy of Sciences
Nizhny Arkhyz, Cherkessk, Russian Federation

5. Institute for Nuclear Research of the Russian Academy of Sciences
Russian Federation

6. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

7. Moscow Institute of Physics and Technology
Lebedev Physical Institute of the Russian Academy of Sciences
Russian Federation

8. Harvard University
Russian Federation

9. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

10. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

11. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

12. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

13. Special Astrophysical Observatory of the Russian Academy of Sciences
Russian Federation

Type:

Сonference article

DOI:

https://doi.org/10.26119/2025-moc05

EDN:

https://elibrary.ru/xlnmac

ELocator:

moc05

Published:

17.12.2025

Subject area:

VAK Russia 1.3.1
UDC 524.7
UDC 524.7-7
UDC 524.7-1/-8
CSCSTI 41.27
CSCSTI 41.51
CSCSTI 41.29
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.06.01
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 6143
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics

Language:

English

Keywords:

active galaxies: quasars; general radio continuum

Abstract and keywords

Abstract:
Monitoring observations and model analysis of instantaneous 1-22 GHz radio spectra of various samples of blazars with strong VLBI (very-long-baseline interferometry) components obtained at RATAN-600 since 1979 and supplemented outside this range with data from the CATS database are continued. The Hedgehog model of a relativistic jet in a strong quasi-radial magnetic field proposed in 1969 by N.S. Kardashev and successfully applied to interpret variable emission spectra of active galactic nuclei is used. The objective of this work is to study the structure and physical parameters of the SMBH neighborhood, as well as a possible proton source of high-energy neutrinos, using spectral methods. We have estimated the magnetic fields, brightness temperatures, angle sizes and other physical parameters for proton jets from spectra fitting.

Keywords:
active galaxies: quasars; general radio continuum

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References

1. Kovalev Yu.A., Kovalev Y.Y, Nizhelsky N., 2000, Publ. Astron. Soc. Japan, 52, p. 1027 DOI: https://doi.org/10.1093/pasj/52.6.1027; EDN: https://elibrary.ru/LFZHSD

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7. Verkhodanov O., Trushkin S., Andernach H., et al., 2005, Data Science Journal, 8, p. 34 DOI: https://doi.org/10.2481/dsj.8.34

8. Vlasyuk V., Sotnikova Y., Volvach A., et al., 2024, MNRAS, 535, p.2775 DOI: https://doi.org/10.1093/mnras/stae2491

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