Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
The flaring activity of blazar AO 0235+164 in 2021. / Escudero Pedrosa, Juan; Agudo, Iván; Moritz, Till; Marscher, Alan P.; Jorstad, Svetlana; Tramacere, Andrea; Casadio, Carolina; Thum, Clemens; Myserlis, Ioannis; Sievers, Albrecht; Otero-Santos, Jorge; Morcuende, Daniel; López-Coto, Rubén; D'Ammando, Filippo; Bonnoli, Giacomo; Gurwell, Mark; Gómez, José Luis; Rao, Ramprasad; Keating, Garrett.
в: Astronomy and Astrophysics, Том 689, A56, 30.08.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The flaring activity of blazar AO 0235+164 in 2021
AU - Escudero Pedrosa, Juan
AU - Agudo, Iván
AU - Moritz, Till
AU - Marscher, Alan P.
AU - Jorstad, Svetlana
AU - Tramacere, Andrea
AU - Casadio, Carolina
AU - Thum, Clemens
AU - Myserlis, Ioannis
AU - Sievers, Albrecht
AU - Otero-Santos, Jorge
AU - Morcuende, Daniel
AU - López-Coto, Rubén
AU - D'Ammando, Filippo
AU - Bonnoli, Giacomo
AU - Gurwell, Mark
AU - Gómez, José Luis
AU - Rao, Ramprasad
AU - Keating, Garrett
PY - 2024/8/30
Y1 - 2024/8/30
N2 - Context. The blazar AO 0235+164, located at redshift z = 0.94, has displayed interesting and repeating flaring activity in the past, with recent episodes in 2008 and 2015. In 2020, the source brightened again, starting a new flaring episode that peaked in 2021. Aims. We study the origin and properties of the 2021 flare in relation to previous studies and the historical behavior of the source, in particular the 2008 and 2015 flaring episodes. Methods.We analyzed the multiwavelength photo-polarimetric evolution of the source. From Very Long Baseline Array images, we derived the kinematic parameters of new components associated with the 2021 flare. We used this information to constrain a model for the spectral energy distribution of the emission during the flaring period. We propose an analytical geometric model to test whether the observed wobbling of the jet is consistent with precession. Results. We report the appearance of two new components that are ejected in a different direction than previously, confirming the wobbling of the jet. We find that the direction of ejection is consistent with that of a precessing jet. Our derived period agrees with the values commonly found in the literature. Modeling of the spectral energy distribution further confirms that the differences between flares can be attributed to geometrical effects.
AB - Context. The blazar AO 0235+164, located at redshift z = 0.94, has displayed interesting and repeating flaring activity in the past, with recent episodes in 2008 and 2015. In 2020, the source brightened again, starting a new flaring episode that peaked in 2021. Aims. We study the origin and properties of the 2021 flare in relation to previous studies and the historical behavior of the source, in particular the 2008 and 2015 flaring episodes. Methods.We analyzed the multiwavelength photo-polarimetric evolution of the source. From Very Long Baseline Array images, we derived the kinematic parameters of new components associated with the 2021 flare. We used this information to constrain a model for the spectral energy distribution of the emission during the flaring period. We propose an analytical geometric model to test whether the observed wobbling of the jet is consistent with precession. Results. We report the appearance of two new components that are ejected in a different direction than previously, confirming the wobbling of the jet. We find that the direction of ejection is consistent with that of a precessing jet. Our derived period agrees with the values commonly found in the literature. Modeling of the spectral energy distribution further confirms that the differences between flares can be attributed to geometrical effects.
KW - accretion
KW - accretion disks
KW - astroparticle physics
KW - polarization
KW - radiation mechanisms: general
KW - relativistic processes
KW - galaxies: jets
KW - Astrophysics - High Energy Astrophysical Phenomena
KW - Accretion
KW - Accretion disks
KW - Astroparticle physics
KW - Galaxies: jets
KW - Polarization
KW - Radiation mechanisms: general
KW - Relativistic processes
UR - https://www.mendeley.com/catalogue/12cf9911-400e-3b47-8090-95140a070836/
U2 - 10.1051/0004-6361/202449726
DO - 10.1051/0004-6361/202449726
M3 - Article
VL - 689
JO - ASTRONOMY & ASTROPHYSICS
JF - ASTRONOMY & ASTROPHYSICS
SN - 0004-6361
M1 - A56
ER -
ID: 125281696