A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Lost in the curve: Investigating the disappearing knots in blazar 3C 454.3
Tekijät: Traianou Efthalia, Krichbaum Thomas P., Gómez José L., Lico Rocco, Paraschos Georgios Filippos, Cho Ilje, Ros Eduardo, Zhao Guang-Yao, Liodakis Ioannis, Dahale Rohan, Toscano Teresa, Fuentes Antonio, Foschi Marianna, Casadio Carolina, MacDonald Nicholas, Kim Jae-Young, Hervet Olivier, Jorstad Svetlana, Lobanov Andrei P., Hodgson Jeffrey, Myserlis Ioannis, Agudo Ivan, Zensus Anton J., Marscher Alan P.
Kustantaja: EDP Sciences
Julkaisuvuosi: 2024
Journal: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: ASTRONOMY & ASTROPHYSICS
Artikkelin numero: A154
Vuosikerta: 682
ISSN: 0004-6361
eISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/202347267
Verkko-osoite: https://www.aanda.org/articles/aa/full_html/2024/02/aa47267-23/aa47267-23.html
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/387244529
Preprintin osoite: https://arxiv.org/abs/2312.15556
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.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
