Evolution, speed, and precession of the parsec-scale jet in the 3C 84 radio galaxy
arXiv:2412.09215 · doi:10.1051/0004-6361/202453406
Abstract
We present high resolution images of the radio source 3C 84 at 43 GHz, from 121 observations conducted by the BEAM-ME monitoring program between 2010 and 2023. Imaging was performed using the recent forward modeling imaging method eht-imaging, which achieved a resolution of 80 as, a factor of 2-3 better than traditional imaging methods such as CLEAN. The sequence of images depicts the growth and expansion of the parsec-scale relativistic jet in 3C 84, clearly resolving a complex internal structure, showing bending in the jet, and changes in its launching direction and expansion speed. We report measurements of the expansion speed in time, which show that the jet undergoes three regimes, marked by the beginning and ending of a hot spot frustration phase. The images' high resolution allows us also to measure the projected launching direction as a function of time, finding an irregular variation pattern. Our results confirm previous studies of the morphological transition underwent by 3C 84 and provide quantitative measurements of the jet's kinematic properties over a decade time-scale.
8 pages, 5 figures
References in corpus (14)
- First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
- RadioAstron -- a Telescope with a Size of 300 000 km: Main Parameters and First Observational Results
- Event Horizon Telescope observations of the jet launching and collimation in Centaurus A
- Kinematics of Parsec-Scale Jets of Gamma-Ray Bright Blazars at 43 GHz during Ten Years of the VLBA-BU-BLAZAR Program
- On the spine-layer scenario for the very high-energy emission of NGC 1275
- Discovery of a new subparsec counterjet in NGC 1275: the inclination angle and the environment
- Filamentary structures as the origin of blazar jet radio variability
- Enhanced Polarized Emission from the One-Parsec-Scale Hotspot of 3C 84 as a Result of the Interaction with Clumpy Ambient Medium
- RadioAstron discovery of a mini-cocoon around the restarted parsec-scale jet in 3C 84
- Jet kinematics in the transversely stratified jet of 3C 84 A two-decade overview
- A detailed kinematic study of 3C 84 and its connection to Gamma-rays
- Discovery of Limb Brightening in the Parsec-scale Jet of NGC 315 through Global Very Long Baseline Interferometry Observations and Its Implications for Jet Models
- Observational Evidence to Support a Dense Ambient Medium Shaping the Jet in 3C 84
- Observing the Time Evolution of the Multi-Component Nucleus of 3C\,84