A detailed kinematic study of 3C 84 and its connection to Gamma-rays

Abstract

3C 84 (NGC 1275) is the bright radio core of the Perseus Cluster. Even in the absence of strong relativistic effects, the source has been detected at Gamma-rays up to TeV energies. Despite its intensive study, the physical processes responsible for the high-energy emission in the source remain unanswered. We present a detailed kinematics study of the source and its connection to Gamma-ray emission. The sub-parsec scale radio structure is dominated by slow-moving features in both the eastern and western lanes of the jet. The jet appears to have accelerated to its maximum speed within less than 125 000 gravitational radii. The fastest reliably detected speed in the jet was ~0.9 c. This leads to a minimum Lorentz factor of ~1.35. Our analysis suggests the presence of multiple high-energy sites in the source. If Gamma-rays are associated with kinematic changes in the jet, they are being produced in both eastern and western lanes in the jet. Three Gamma-ray flares are contemporaneous with epochs where the slowly moving emission region splits into two sub-regions. We estimate the significance of these events being associated as ~2-3 sigma. We tested our results against theoretical predictions for magnetic reconnection-induced mini-jets and turbulence and find them compatible.

15 pages, 21 figures, 13 tables, Accepted to ApJ

References in corpus (18)

• The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
• Fast TeV variability in blazars: jets in a jet
• The 1% Concordance Hubble Constant
• Kinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43~GHz within the VLBA-BU-BLAZAR Program
• Kinematics of the jet in M87 on scales of 100 -- 1000 Schwarzschild radii
• Cold molecular gas in the Perseus cluster core - Association with X-ray cavity, Halpha filaments and cooling flow -
• Detection of significant cm to sub-mm band radio and gamma-ray correlated variability in Fermi bright blazars
• Radially-Inflowing Molecular Gas in NGC 1275 Deposited by a X-ray Cooling Flow in the Perseus Cluster
• Kinematics of the M87 jet in the collimation zone: gradual acceleration and velocity stratification
• Scenarios for ultrafast gamma-ray variability in AGN
• 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
• Wavelet-based decomposition and analysis of structural patterns in astronomical images
• Enhanced Polarized Emission from the One-Parsec-Scale Hotspot of 3C 84 as a Result of the Interaction with Clumpy Ambient Medium
• Rapid Gamma-ray variability of NGC 1275
• Constraints on Circumnuclear Disk through Free-Free Absorption in the Nucleus of 3C 84 with KaVA and KVN at 43 and 86 GHz
• Using variability and VLBI to measure cosmological distances
• Fossil shell in 3C 84 as TeV $\gamma$-ray emitter and cosmic-ray accelerator

Cited by in corpus (11)

• Ordered magnetic fields around the 3C 84 central black hole
• A multiband study and exploration of the radio wave - $\gamma$-ray connection in 3C 84
• Jet kinematics in the transversely stratified jet of 3C 84 A two-decade overview
• A persistent double nuclear structure in 3C 84
• The interaction between rising bubbles and cold fronts in cool core clusters
• Evidence for a toroidal magnetic field in the core of 3C 84
• Observational Evidence to Support a Dense Ambient Medium Shaping the Jet in 3C 84
• Probing the circumnuclear environment of NGC1275 with High-Resolution X-ray spectroscopy
• Evolution, speed, and precession of the parsec-scale jet in the 3C 84 radio galaxy
• Where within the 3C 84 jet are $\gamma$-rays produced?
• Detection of Compton scattering in the jet of 3C 84