Detection of a quasi-periodic oscillation in the optical light curve of the remarkable blazar AO 0235+164
| Autor: | Abhradeep Roy, Varsha R Chitnis, Alok C Gupta, Paul J Wiita, Gustavo E Romero, Sergio A Cellone, Anshu Chatterjee, Jorge A Combi, Claudia M Raiteri, Arkadipta Sarkar, Massimo Villata |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 513:5238-5244 |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | We present a long term optical $R$ band light curve analysis of the gravitationally lensed blazar AO 0235+164 in the time span 1982 - 2019. Several methods of analysis lead to the result that there is a periodicity of ~8.13 years present in these data. In addition, each of these five major flares are apparently double-peaked, with the secondary peak following the primary one by ~2 years. Along with the well known system, OJ 287, our finding constitutes one of the most secure cases of long term quasi-periodic optical behaviour in a blazar ever found. A binary supermassive black hole system appears to provide a good explanation for these results. 7 pages, 3 figures, 1 table, Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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