학술논문
The Vanishing of the Primary Emission Region in PKS 1510–089
Document Type
article
Author
F. Aharonian; F. Ait Benkhali; J. Aschersleben; H. Ashkar; M. Backes; V. Barbosa Martins; J. Barnard; R. Batzofin; Y. Becherini; D. Berge; K. Bernlöhr; B. Bi; M. de Bony de Lavergne; M. Böttcher; C. Boisson; J. Bolmont; J. Borowska; M. Bouyahiaoui; F. Bradascio; M. Breuhaus; R. Brose; A. M. Brown; F. Brun; B. Bruno; T. Bulik; C. Burger-Scheidlin; S. Caroff; S. Casanova; R. Cecil; J. Celic; M. Cerruti; T. Chand; S. Chandra; A. Chen; J. Chibueze; O. Chibueze; G. Cotter; J. Damascene Mbarubucyeye; I. D. Davids; A. Djannati-Ataï; A. Dmytriiev; V. 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; W. Hofmann; T. L. Holch; M. Holler; D. Horns; M. Jamrozy; F. Jankowsky; V. Joshi; I. Jung-Richardt; E. Kasai; K. Katarzyński; R. Khatoon; B. Khélifi; W. Kluźniak; Nu. Komin; K. Kosack; D. Kostunin; R. G. Lang; S. Le Stum; F. Leitl; A. Lemière; J.-P. Lenain; F. Leuschner; A. Luashvili; J. Mackey; V. Marandon; P. Marchegiani; G. Martí-Devesa; R. Marx; A. Mehta; M. Meyer; A. Mitchell; R. Moderski; L. Mohrmann; A. Montanari; E. Moulin; M. de Naurois; J. Niemiec; A. Priyana Noel; P. O’Brien; S. Ohm; L. Olivera-Nieto; E. de Ona Wilhelmi; M. Ostrowski; S. Panny; M. Panter; G. Peron; D. A. Prokhorov; G. Pühlhofer; M. Punch; A. Quirrenbach; P. Reichherzer; A. Reimer; O. Reimer; H. Ren; F. Rieger; G. Rowell; B. Rudak; H. Rueda Ricarte; E. Ruiz-Velasco; V. Sahakian; H. Salzmann; D. A. Sanchez; A. Santangelo; M. Sasaki; F. Schüssler; H. M. Schutte; U. Schwanke; J. N. S. Shapopi; H. Sol; A. Specovius; S. Spencer; Ł. Stawarz; R. Steenkamp; S. Steinmassl; C. Steppa; I. Sushch; H. Suzuki; T. Takahashi; T. Tanaka; R. Terrier; N. Tsuji; C. van Eldik; B. van Soelen; M. Vecchi; J. Veh; J. Vink; T. Wach; S. J. Wagner; A. Wierzcholska; M. Zacharias; D. Zargaryan; A. A. Zdziarski; A. Zech; S. Zouari; N. Żywucka; D. A. H. Buckley; J. Cooper; D. Groenewald; H.E.S.S. Collaboration
Source
The Astrophysical Journal Letters, Vol 952, Iss 2, p L38 (2023)
Subject
Language
English
ISSN
2041-8213
2041-8205
2041-8205
Abstract
In 2021 July, PKS 1510−089 exhibited a significant flux drop in the high-energy γ -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 γ -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 γ -ray and X-ray fluxes originate from a different emission region than the vanished parts of the high-energy γ -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.