TY - JOUR

T1 - Lost in the curve: Investigating the disappearing knots in blazar 3C 454.3

T2 - Astronomy and Astrophysics

AU - Traianou, E.

AU - Krichbaum, T.P.

AU - Gómez, J.L.

AU - Lico, R.

AU - Paraschos, G.F.

AU - Cho, I.

AU - Ros, E.

AU - Zhao, G.-Y.

AU - Liodakis, I.

AU - Dahale, R.

AU - Toscano, T.

AU - Fuentes, A.

AU - Foschi, M.

AU - Casadio, C.

AU - MacDonald, N.

AU - Kim, J.-Y.

AU - Hervet, O.

AU - Jorstad, S.

AU - Lobanov, A.P.

AU - Hodgson, J.

AU - Myserlis, I.

AU - Agudo, I.

AU - Zensus, A.J.

AU - Marscher, A.P.

N1 - Export Date: 4 March 2024 CODEN: AAEJA Сведения о финансировании: 101040021 Сведения о финансировании: 80NSSC20K1567 Сведения о финансировании: National Science Foundation, NSF, AST-0808050, AST-1109911 Сведения о финансировании: Smithsonian Institution, SI Сведения о финансировании: National Aeronautics and Space Administration, NASA, NNX08AW31G, NNX11A043G, NNX14AQ89G Сведения о финансировании: Horizon 2020 Framework Programme, H2020, 101018682 Сведения о финансировании: European Research Council, ERC Сведения о финансировании: Academia Sinica, AS, CEX2021-001131-S Сведения о финансировании: Ministry of Science, ICT and Future Planning, MSIP, 2022R1C1C1005255 Сведения о финансировании: National Research Foundation of Korea, NRF Сведения о финансировании: Centre National de la Recherche Scientifique, CNRS Сведения о финансировании: Ministerio de Ciencia e Innovación, MICINN Сведения о финансировании: Agencia Estatal de Investigación, AEI Текст о финансировании 1: I would like to express my gratitude to the Professors Pantelis Papadopoulos and Nikolaos Stergioulas from the Aristotle University of Thessaloniki (APTH), as well as the post-doctoral researcher Nikos Karnesis for the fruitful discussions and their hospitality. This research has made use of data obtained with the Global Millimeter VLBI Array (GMVA), which consists of telescopes operated by the MPIfR, IRAM, Onsala, Metsähovi, Yebes, the Korean VLBI Network, the Green Bank Observatory and the Very Long Baseline Array (VLBA). The VLBA is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The data were correlated at the DiFX correlator of the MPIfR in Bonn, Germany. We express our special thanks to the people supporting the observations at the telescopes during the data collection. We express our special thanks to the observers at the telescopes and the observatory staff for their help and support in running the GMVA. This research has made use of data from the OVRO 40-m monitoring program (Richards et al. 2011), which is supported in part by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G and NSF grants AST-0808050 and AST-1109911. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. This research has made use of NASA’s Astrophysics Data System. E.T. acknowledges financial support from the grant CEX2021-001131-S funded by MCIN/AEI/ 10.13039/501100011033. This work is partly based on observations carried out with the IRAM 30 m telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). J.Y.K. was supported for this research by the National Research Foundation of Korea (NRF) funded by the Korean government (Ministry of Science and ICT; grant no. 2022R1C1C1005255). C.C. acknowledges support by the European Research Council (ERC) under the HORIZON ERC Grants 2021 programme under grant agreement No. 101040021. This work is part of the M2FINDERS project which has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Programme (grant agreement No 101018682). The research at Boston University was supported in part by NASA Fermi GI grant 80NSSC20K1567. Пристатейные ссылки: Abdo, A.A., Ackermann, M., Ajello, M., (2011) ApJ, 733, p. L26; Ackermann, M., Ajello, M., Baldini, L., (2010) ApJ, 721, p. 1383; Agudo, I., Thum, C., Molina, S.N., (2017) MNRAS, 474, p. 1427; Agudo, I., Thum, C., Ramakrishnan, V., (2017) MNRAS, 473, p. 1850; Alberdi, A., Marcaide, J.M., Marscher, A.P., (1993) ApJ, 402, p. 160; Aleksić, J., Ansoldi, S., Antonelli, L.A., (2014) A&A, 567, p. A41; Araudo, A.T., Bosch-Ramon, V., Romero, G.E., (2010) A&A, 522, p. A97; Baring, M.G., Boettcher, M., (2019), arXiv e-prints; Beuchert, T., Kadler, M., Perucho, M., (2018) A&A, 610, p. A32; Blandford, R., Yuan, Y., Hoshino, M., Sironi, L., (2017) Space Sci. 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A113

PY - 2024/2/1

Y1 - 2024/2/1

N2 - One of the most well-known extragalactic sources in the sky, quasar 3C 454.3, shows a curved parsec-scale jet that has been exhaustively monitored with very-long-baseline interferometry (VLBI) over the recent years. In this work, we present a comprehensive analysis of four years of high-frequency VLBI observations at 43 GHz and 86 GHz, between 2013-2017, in total intensity and linear polarization. The images obtained from these observations enabled us to study the jet structure and the magnetic field topology of the source on spatial scales down to 4.6 parsec in projected distance. The kinematic analysis reveals the abrupt vanishing of at least four new superluminal jet features in a characteristic jet region (i.e., region C), which is located at an approximate distance of 0.6 milliarcsec from the VLBI core. Our results support a model in which the jet bends, directing the relativistic plasma flow almost perfectly toward our line of sight, co-spatially with the region where components appear to stop. © 2024 The Authors.

AB - One of the most well-known extragalactic sources in the sky, quasar 3C 454.3, shows a curved parsec-scale jet that has been exhaustively monitored with very-long-baseline interferometry (VLBI) over the recent years. In this work, we present a comprehensive analysis of four years of high-frequency VLBI observations at 43 GHz and 86 GHz, between 2013-2017, in total intensity and linear polarization. The images obtained from these observations enabled us to study the jet structure and the magnetic field topology of the source on spatial scales down to 4.6 parsec in projected distance. The kinematic analysis reveals the abrupt vanishing of at least four new superluminal jet features in a characteristic jet region (i.e., region C), which is located at an approximate distance of 0.6 milliarcsec from the VLBI core. Our results support a model in which the jet bends, directing the relativistic plasma flow almost perfectly toward our line of sight, co-spatially with the region where components appear to stop. © 2024 The Authors.

KW - Black hole physics

KW - Galaxies: active

KW - Galaxies: jets

KW - Galaxies: magnetic fields

KW - Galaxies: nuclei

KW - Quasars: supermassive black holes

KW - Black holes

KW - Gravitation

KW - Magnetic fields

KW - Radio astronomy

KW - Stars

KW - Black Hole physics

KW - Comprehensive analysis

KW - Extragalactic sources

KW - Galaxies active

KW - Galaxies jets

KW - Galaxies:Nuclei

KW - Quasar: supermassive black hole

KW - Supermassive black holes

KW - Very long baseline interferometry

KW - Galaxies

UR - https://www.mendeley.com/catalogue/14d9d22d-33dd-3460-8485-1775eef0e576/

U2 - 10.1051/0004-6361/202347267

DO - 10.1051/0004-6361/202347267

M3 - статья

VL - 682

SP - A154

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

ER -