دورية أكاديمية
The Repeating Flaring Activity of Blazar AO 0235+164
| العنوان: | The Repeating Flaring Activity of Blazar AO 0235+164 |
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| المؤلفون: | Pedrosa, Juan Escudero, Agudo, Iván, Tramacere, Andrea, Marscher, Alan P., Jorstad, Svetlana, Weaver, Z. R., Casadio, Carolina, Thum, Clemens, Myserlis, Ioannis, Fuentes, Antonio, Traianou, Efthalia, Kim, Jae-Young, Kramer, Joana, López-Coto, Rubén, D'Ammando, Filippo, Bernardos, M., Bonnoli, Giacomo, Blinov, Dmitriy A., Borman, G. A., Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionova, E. G., Larionov, V. M., Larionova, L. V., Morozova, D. A., Savchenko, S. S., Troitskiy, I. S., Troitskaya, Y. V., Vasilyev, A. A. |
| سنة النشر: | 2023 |
| المجموعة: | ArXiv.org (Cornell University Library) |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | Context. Blazar AO 0235+164, located at redshift z = 0.94, has undergone several sharp multi-spectral-range flaring episodes during the last decades. In particular, the episodes peaking in 2008 and 2015, that received extensive multi-wavelength coverage, exhibited interesting behavior. Aims. We study the actual origin of these two observed flares by constraining the properties of the observed photo-polarimetric variability, those of the broad-band spectral energy-distribution and the observed time-evolution behavior of the source as seen by ultra-high resolution total-flux and polarimetric Very-long-baseline interferometry (VLBI) imaging. Methods. The analysis of VLBI images allows us to constrain kinematic and geometrical parameters of the 7 mm jet. We use the Discrete Correlation Function to compute the statistical correlation and the delays between emission at different spectral ranges. Multi-epoch modeling of the spectral energy distributions allows us to propose specific models of emission; in particular for the unusual spectral features observed in this source in the X-ray region of the spectrum during strong multi spectral-range flares. Results. We find that these X-ray spectral features can be explained by an emission component originating in a separate particle distribution than the one responsible for the two standard blazar bumps. This is in agreement with the results of our correlation analysis that do not find a strong correlation between the X-rays and the remaining spectral ranges. We find that both external Compton dominated and synchrotron self-Compton dominated models can explain the observed spectral energy distributions. However, synchrotron self-Compton models are strongly favored by the delays and geometrical parameters inferred from the observations. |
| نوع الوثيقة: | text |
| اللغة: | unknown |
| العلاقة: | http://arxiv.org/abs/2311.01157Test |
| DOI: | 10.1051/0004-6361/202346885 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/202346885Test http://arxiv.org/abs/2311.01157Test |
| رقم الانضمام: | edsbas.DE7956A1 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/202346885 |
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