Enhanced Polarized Emission from the One-Parsec-Scale Hotspot of 3C 84 as a Result of the Interaction with Clumpy Ambient Medium

Abstract

We present Very Long Baseline Array polarimetric observations of the innermost jet of 3C$\sim$84 (NGC$\sim$1275) at 43$\sim$GHz. A significant polarized emission is detected at the hotspot of the innermost re-started jet, which is located $\sim$1 pc south from the radio core. While the previous report presented a hotspot at the southern end of the western limb, the hotspot location has been moved to the southern end of the eastern limb. Faraday rotation is detected within an entire bandwidth of the 43-GHz band. The measured rotation measure (RM) is at most (6.3$\pm$1.9)$\times 10^5$$\sim$rad$\sim$m${}^{-2}$ and might be slightly time variable on the timescale of a month by a factor of a few. Our measured RM and the RM previously reported by the CARMA and SMA observations cannot be consistently explained by the spherical accretion flow with a power-law profile. We propose that a clumpy/inhomogeneous ambient medium is responsible for the observed rotation measure. Using equipartition magnetic field, we derive the electron density of $2\times 10^4$$\sim$cm${}^{-3}$. Such an electron density is consistent with the cloud of narrow line emission region around the central engine. We also discuss the magnetic field configuration from black hole scale to pc scale and the origin of low polarization.

arXiv comment8 pages, 8 figures, accepted for publication in ApJ

References in corpus (52)

• Heating Hot Atmospheres with Active Galactic Nuclei
• Nuclear Activity in Nearby Galaxies
• Advection-Dominated Accretion: Self-Similarity and Bipolar Outflows
• Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
• Nonthermal Electrons in Radiatively Inefficient Accretion Flow Models of Sagittarius A*
• A deep Chandra observation of the Perseus cluster: shocks and ripples
• Structured jets in TeV BL Lac objects and radiogalaxies
• The Formation and Structure of a Strongly Magnetized Corona above Weakly Magnetized Accretion Disks
• Self-Similar Accretion Flows with Convection
• Chaotic cold accretion onto black holes
• Driving Outflows with Relativistic Jets and the Dependence of AGN Feedback Efficiency on ISM Inhomogeneity
• Magnetic field strength and spectral distribution of six parsec-scale active galactic nuclei jets
• The Inner Jet of the Radio Galaxy M87
• Cold molecular gas in the Perseus cluster core - Association with X-ray cavity, Halpha filaments and cooling flow -
• Placing Confidence Limits on Polarization Measurements
• Interferometric Measurements of Variable 340 GHz Linear Polarization in Sagittarius A*
• Coronal outflow dominated accretion discs: a new possibility for low luminosity black holes?
• Constraining the Accretion Rate Onto Sagittarius A* Using Linear Polarization
• A VLBA survey of the core shift effect in AGN jets I. Evidence for dominating synchrotron opacity
• Magnetic support of the optical emission line filaments in NGC 1275
• Spine-sheath layer radiative interplay in subparsec-scale jets and the TeV emission from M87
• High Frequency VLBI Imaging of the Jet Base of M87
• VLBA Absorption Imaging of Ionized Gas Associated with the Accretion Disk in NGC 1275
• Measuring Mass Accretion Rate onto the Supermassive Black Hole in M 87 Using Faraday Rotation Measure with the Submillimeter Array
• Limb-Brightened Jet of 3C 84 Revealed by the 43-GHz Very-Long-Baseline-Array Observation
• On viscosity, conduction and sound waves in the intracluster medium
• Magnetic Fields in the Center of the Perseus Cluster
• The Existence of Inner Cool Disks in the Low Hard State of Accreting Black Holes
• Kinematics and Excitation of the Molecular Hydrogen Accretion Disc in NGC 1275
• Radially-Inflowing Molecular Gas in NGC 1275 Deposited by a X-ray Cooling Flow in the Perseus Cluster
• Bondi flow from a slowly rotating hot atmosphere
• VLBI Monitoring of 3C 84 (NGC 1275) in Early Phase of the 2005 Outburst
• Faraday Rotation Measures in the Parsec-Scale Jets of the Radio Galaxies M87, 3C 111, and 3C 120
• The Mid-Infrared Emission of M87
• Numerical Parameter Survey of Nonradiative Black Hole Accretion -- Flow Structure and Variability of the Rotation Measure
• Magnetization degree at the jet base of M87 derived from the event horizon telescope data: Testing magnetically driven jet paradigm
• Integral Field Near-IR Spectroscopy of a Sample of Seyfert and LINER Galaxies I: The Data
• On the spine-layer scenario for the very high-energy emission of NGC 1275
• First 3 mm-VLBI imaging of the two-sided jet in Cygnus A. Zooming into the launching region
• The X-ray Jet in Centaurus A: Clues on the Jet Structure and Particle Acceleration
• Discovery of a new subparsec counterjet in NGC 1275: the inclination angle and the environment
• Multiphase, non-spherical gas accretion onto a black hole
• Spectral distributions in compact radio sources I. Imaging with VLBI data
• Radio Mini-Halo Emission from Cosmic Rays in Galaxy Clusters and Heating of the Cool Cores
• Probing the Parsec-scale Accretion Flow of 3C 84 with Millimeter Polarimetry
• A Non-thermal Study of the Brightest Cluster Galaxy NGC 1275 - The Gamma-Radio Connection Over Four Decades
• A Search for Molecular Gas in the Nucleus of M87 and Implications for the Fueling of Supermassive Black Holes
• Hitomi observations of Perseus support heating by mixing
• Non-thermal Emissions from Cool Cores Heated by Cosmic-Rays in Galaxy Clusters
• The young radio lobe of 3C 84: inferred gas properties in the central 10 parsec
• Constraints on the Viscosity and Magnetic Field in Hot Accretion Flows around Black Holes
• The Origin of Ripples in Cool Cores of Galaxy Clusters: Heating by MHD Waves?

Cited by in corpus (25)

• A wide and collimated radio jet in 3C 84 on the scale of a few hundred gravitational radii
• Polarimetric properties of Event Horizon Telescope targets from ALMA
• Faraday rotation in the jet of M87 inside the Bondi radius: indication of winds from hot accretion flows confining the relativistic jet
• Jet collimation in NGC 315 and other nearby AGN
• The ALMA Discovery of the Rotating Disk and Fast Outflow of Cold Molecular Gas in NGC 1275
• Spatially resolved origin of mm-wave linear polarization in the nuclear region of 3C 84
• Evidence of jet-clump interaction: a flip of the radio jet head of 3C~84
• Ordered magnetic fields around the 3C 84 central black hole
• GPCAL: a generalized calibration pipeline for instrumental polarization in VLBI data
• 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
• The Dynamics and Energetics of Remnant and Restarting RLAGN
• Constraints on Circumnuclear Disk through Free-Free Absorption in the Nucleus of 3C 84 with KaVA and KVN at 43 and 86 GHz
• A detailed kinematic study of 3C 84 and its connection to Gamma-rays
• Evidence for a toroidal magnetic field in the core of 3C 84
• VERA monitoring of the radio jet 3C 84 during 2007--2013: detection of non-linear motion
• Polarization Observations of AGN Jets: Past and Future
• Active galactic nuclei imaging programs of the RadioAstron mission
• Probing the Heart of Active Narrow-line Seyfert 1 Galaxies with VERA Wideband Polarimetry
• Diffuse Synchrotron Emission Associated with the Starburst in the Circumnuclear Disk of NGC 1275
• Discovery of Radio Jets in Phoenix Galaxy Cluster Center
• The Japanese Vision for the Black Hole Explorer Mission
• Evolution, speed, and precession of the parsec-scale jet in the 3C 84 radio galaxy
• A revised view of the linear polarization in the subparsec core of M87 at 7 mm
• Where within the 3C 84 jet are $\gamma$-rays produced?