Portal de Periódicos da CAPES

The Vanishing of the Primary Emission Region in PKS 1510–089

2023; IOP Publishing; Volume: 952; Issue: 2 Linguagem: Inglês

10.3847/2041-8213/ace3c0

2041-8213

F. Aharonian, F. Ait Benkhali, J. Aschersleben, Halim Ashkar, Michael Backes, V. Barbosa Martins, J. Barnard, R. Batzofin, Y. Becherini, D. Berge, K. Bernlöhr, Baiyang Bi, Mathieu de Bony de Lavergne, M. Böttcher, C. Boisson, J. Bolmont, Jowita Borowska, M. Bouyahiaoui, Federica Bradascio, M. Breuhaus, Robert Brose, A. M. Brown, F. Brun, B. Bruno, T. Bulik, C. Burger-Scheidlin, Sami Caroff, S. Casanova, R. Cecil, J. Celic, M. Cerruti, T. Chand, S. Chandra, A. Chen, James O. Chibueze, O. Chibueze, G. Cotter, J. Damascene Mbarubucyeye, I. D. Davids, A. Djannati-Ataı̈, A. Dmytriiev, Victor Doroshenko, K. Egberts, S Einecke, J.-P. Ernenwein, S. Fegan, G. Fontaine, M. Füßling, S. Funk, S. Gabici, S. Ghafourizadeh, G. Giavitto, D. Glawion, J. F. Glicenstein, P. Goswami, G. Grolleron, L. Haerer, Wilfried Hofmann, T. L. Holch, M. Holler, D. Horns, M. Jamrozy, F. Jankowsky, Vikas Joshi, I. Jung-Richardt, E. Kasai, K. Katarzyński, Rabeya Khatoon, B. Khélifi, W. Kluźniak, Nu. Komin, K. Kosack, D. Kostunin, Rodrigo Guedes Lang, S. Le Stum, F. Leitl, A. Lemière, J.-P. Lenain, Fabian Leuschner, Anna Luashvili, Jonathan Mackey, V. Marandon, ¶. Marchegiani, G. Martí-Devesa, R. Marx, A. K. Mehta, M. Meyer, Alison Mitchell, R. Moderski, L. Mohrmann, Alessandro Montanari, E. Moulin, M. de Naurois, J. Niemiec, A. Priyana Noel, P. T. O’Brien, S. Ohm, Laura Olivera-Nieto, E. de Oña Wilhelmi, M. Ostrowski, Sebastian Panny, M. Panter, Giada Peron, Д. А. Прохоров, G. Pühlhofer, M. Punch, A. Quirrenbach, Patrick Reichherzer, A. Reimer, O. Reimer, Helena X. Ren, Frank Rieger, Gavin Rowell, B. Rudak, Héctor Rueda, E. Ruiz-Velasco, V. Sahakian, Heiko Salzmann, D. A. Sánchez, A. Santangelo, M. Sasaki, F. Schüßler, Hester Schutte, U. Schwanke, J. N. S. Shapopi, H. Sol, Andreas Specovius, S. Spencer, Ł. Stawarz, R. Steenkamp, S. Steinmassl, C. Steppa, I. Sushch, Hiroyuki Suzuki, T. Takahashi, T. Tanaka, R. Terrier, Naomi Tsuji, C. van Eldik, B. van Soelen, M. Vecchi, J. Veh, Jacco Vink, T. Wach, S. J. Wagner, A. Wierzcholska, M. Zacharias, D. Zargaryan, A. A. Zdziarski, A. Zech, Samuël Zouari, N. Żywucka, D. A. H. Buckley, Justin Cooper, Danièl Groenewald,

Astrophysical Phenomena and Observations

In July 2021, PKS 1510-089 exhibited a significant flux drop in the high-energy gamma-ray (by a factor 10) and optical (by a factor 5) bands and remained in this low state throughout 2022. Similarly, the optical polarization in the source vanished, resulting in the optical spectrum being fully explained through the steady flux of the accretion disk and the broad-line region. Unlike the aforementioned bands, the very-high-energy gamma-ray and X-ray fluxes did not exhibit a significant flux drop from year to year. This suggests that the steady-state very-high-energy gamma-ray and X-ray fluxes originate from a different emission region than the vanished parts of the high-energy gamma-ray and optical jet fluxes. The latter component has disappeared through either a swing of the jet away from the line-of-sight or a significant drop in the photon production efficiency of the jet close to the black hole. Either change could become visible in high-resolution radio images.