Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Multiwavelength variability of the blazar AO 0235+164. / Vlasyuk, V.V.; Sotnikova, Y.V.; Volvach, A.E.; Mufakharov, T.V.; Kovalev, Y.A.; Spiridonova, O.I.; Khabibullina, M.L.; Kovalev, Y.Y.; Mikhailov, A.G.; Stolyarov, V.A.; Kudryavtsev, D.O.; Mingaliev, M.G.; Razzaque, S.; Semenova, T.A.; Kudryashova, A.K.; Bursov, N.N.; Trushkin, S.A.; Popkov, A.V.; Erkenov, A.K.; Rakhimov, I.A.; Kharinov, M.A.; Gurwell, M.A.; Tsybulev, P.G.; Moskvitin, A.S.; Fatkhullin, T.A.; Emelianov, E.V.; Arshinova, A.; Iuzhanina, K.V.; Andreeva, T.S.; Volvach, L.N.; Ghosh, A.
в: Monthly Notices of the Royal Astronomical Society, Том 535, № 3, 2024, стр. 2775-2799.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Multiwavelength variability of the blazar AO 0235+164
AU - Vlasyuk, V.V.
AU - Sotnikova, Y.V.
AU - Volvach, A.E.
AU - Mufakharov, T.V.
AU - Kovalev, Y.A.
AU - Spiridonova, O.I.
AU - Khabibullina, M.L.
AU - Kovalev, Y.Y.
AU - Mikhailov, A.G.
AU - Stolyarov, V.A.
AU - Kudryavtsev, D.O.
AU - Mingaliev, M.G.
AU - Razzaque, S.
AU - Semenova, T.A.
AU - Kudryashova, A.K.
AU - Bursov, N.N.
AU - Trushkin, S.A.
AU - Popkov, A.V.
AU - Erkenov, A.K.
AU - Rakhimov, I.A.
AU - Kharinov, M.A.
AU - Gurwell, M.A.
AU - Tsybulev, P.G.
AU - Moskvitin, A.S.
AU - Fatkhullin, T.A.
AU - Emelianov, E.V.
AU - Arshinova, A.
AU - Iuzhanina, K.V.
AU - Andreeva, T.S.
AU - Volvach, L.N.
AU - Ghosh, A.
N1 - Export Date: 01 November 2025; Cited By: 2; Correspondence Address: V.V. Vlasyuk; Special Astrophysical Observatory, The Russian Academy of Sciences, Nizhny Arkhyz, 369167, Russian Federation; email: vvlassao@gmail.com; CODEN: MNRAA
PY - 2024
Y1 - 2024
N2 - We present a study of the multiwavelength (MW) variability of the blazar AO 0235+164 based on the radio-to-γ-ray data covering a long time period from 1997 to 2023. The radio data are represented by the 1-22 GHz measurements from the SAO RAS RATAN-600 radio telescope, the 5 and 8 GHz data from the IAA RAS RT-32 telescopes, and the 37 GHz data from the RT-22 telescope of CrAO RAS. The optical measurements in the R-band were collected with the SAO RAS 1-m Zeiss-1000 and 0.5-m AS-500/2 telescopes. Additionally, we used the archive data at 230 GHz from the Submillimetre Array and the γ-ray data in the 0.1-100 GeV band from the Fermi-LAT point source 4FGL-DR2 catalogue. The variability properties during four epochs containing major flares and one epoch of relatively low activity were analysed using the fractional variability indices, discrete correlation functions, Lomb-Scargle periodograms, and structure functions. A significant correlation (≥2σ) between the radio, optical, and γ-ray bands is found for all these periods with time delays from 0 to 1.7 yr. The relation between time delay and frequency is described by a linear law with a negative slope of -10 d GHz-1. The discovered properties of MW variability for the low-activity period and for flaring states suggest that the mechanisms dominating the radio-γ-ray variations are not substantially different. The detected quasi-periodic oscillations of about 6 and 2 yr are tentative, as the time span of the observations includes fewer than four full cycles for the radio and optical data and only about three cycles for the Fermi-LAT data. These results should be interpreted with caution, given the limited number of observed cycles and the influence of red noise. We used cluster analysis to reliably separate the high and low-activity states and determined statistical differences in the main properties of AO 0235+164 non-thermal emission. The physical parameters of the radio jet were obtained using the Hedgehog model applied to the average radio spectrum of AO 0235+164 in the range 0.1-300 GHz. The effectiveness of replacing electrons with protons in the synchrotron radio emission of relativistic jets is shown for describing the nature of blazars and the generation of high-energy neutrinos. © 2024 Elsevier B.V., All rights reserved.
AB - We present a study of the multiwavelength (MW) variability of the blazar AO 0235+164 based on the radio-to-γ-ray data covering a long time period from 1997 to 2023. The radio data are represented by the 1-22 GHz measurements from the SAO RAS RATAN-600 radio telescope, the 5 and 8 GHz data from the IAA RAS RT-32 telescopes, and the 37 GHz data from the RT-22 telescope of CrAO RAS. The optical measurements in the R-band were collected with the SAO RAS 1-m Zeiss-1000 and 0.5-m AS-500/2 telescopes. Additionally, we used the archive data at 230 GHz from the Submillimetre Array and the γ-ray data in the 0.1-100 GeV band from the Fermi-LAT point source 4FGL-DR2 catalogue. The variability properties during four epochs containing major flares and one epoch of relatively low activity were analysed using the fractional variability indices, discrete correlation functions, Lomb-Scargle periodograms, and structure functions. A significant correlation (≥2σ) between the radio, optical, and γ-ray bands is found for all these periods with time delays from 0 to 1.7 yr. The relation between time delay and frequency is described by a linear law with a negative slope of -10 d GHz-1. The discovered properties of MW variability for the low-activity period and for flaring states suggest that the mechanisms dominating the radio-γ-ray variations are not substantially different. The detected quasi-periodic oscillations of about 6 and 2 yr are tentative, as the time span of the observations includes fewer than four full cycles for the radio and optical data and only about three cycles for the Fermi-LAT data. These results should be interpreted with caution, given the limited number of observed cycles and the influence of red noise. We used cluster analysis to reliably separate the high and low-activity states and determined statistical differences in the main properties of AO 0235+164 non-thermal emission. The physical parameters of the radio jet were obtained using the Hedgehog model applied to the average radio spectrum of AO 0235+164 in the range 0.1-300 GHz. The effectiveness of replacing electrons with protons in the synchrotron radio emission of relativistic jets is shown for describing the nature of blazars and the generation of high-energy neutrinos. © 2024 Elsevier B.V., All rights reserved.
KW - (galaxies:) BL Lacertae objects: individual: AO 0235+164
KW - galaxies: active
KW - galaxies: jets
KW - radio continuum: galaxies
KW - Gamma radiography
KW - Image resolution
KW - Optical telescopes
KW - Optical variables measurement
KW - (galaxy:) BL lacertae object: individual: AO 0235+164
KW - Blazars
KW - Galaxies active
KW - Galaxies jets
KW - Galaxies: BL Lacertae objects
KW - Multiwavelength
KW - Property
KW - Radio continuum: galaxies
KW - Radio data
KW - Time-delays
KW - Optical correlation
U2 - 10.1093/mnras/stae2491
DO - 10.1093/mnras/stae2491
M3 - статья
VL - 535
SP - 2775
EP - 2799
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 3
ER -
ID: 143419520