VLBI observations of bright AGN jets with KVN and VERA Array (KaVA): Evaluation of Imaging Capability
arXiv:1406.4356 · doi:10.1093/pasj/psu104
Abstract
The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to high-frequency (23 and 43 GHz bands) observations in East Asia. Here, we report the first imaging observations of three bright active galactic nuclei (AGNs) known for their complex morphologies: 4C 39.25, 3C 273, and M 87. This is one of the initial result of KaVA early science. Our KaVA images reveal extended outflows with complex substructure such as knots and limb brightening, in agreement with previous Very Long Baseline Array (VLBA) observations. Angular resolutions are better than 1.4 and 0.8 milliarcsecond at 23 GHz and 43 GHz, respectively. KaVA achieves a high dynamic range of ~1000, more than three times the value achieved by VERA. We conclude that KaVA is a powerful array with a great potential for the study of AGN outflows, at least comparable to the best existing radio interferometric arrays.
arXiv comment15 pages, 10 figures, 6 tables, accepted for publication in PASJ
References in corpus (16)
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- The Second Data Release of the Sloan Digital Sky Survey
- The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
- MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in AGN
- Magnetic field strength and spectral distribution of six parsec-scale active galactic nuclei jets
- A Global 86GHz VLBI Survey of Compact Radio Sources
- Innermost collimation structure of the M87 jet down to ~ten Schwarzschild radii
- Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program
- VLBI Monitoring of 3C 84 (NGC 1275) in Early Phase of the 2005 Outburst
- Radio and gamma-ray follow-up of the exceptionally high activity state of PKS 1510-089 in 2011
- Single dish performance of KVN 21-m radio telescopes:Simultaneous observations at 22 and 43 GHz
- First Fringe Detection with VERA's Dual-Beam System and its Phase Referencing Capability
- VLBI Observations of the Jet in M87 During the Very-High-Energy Gamma-ray Flare in April 2010
- The First Very Long Baseline Interferometry Image of 44 GHz Methanol Maser with the KVN and VERA Array (KaVA)
- GENJI Programme: Gamma-ray Emitting Notable AGN Monitoring by Japanese VLBI
- Early science with Korean VLBI network: the QCAL-1 43GHz calibrator survey
Cited by in corpus (32)
- Parabolic Jets from the Spinning Black Hole in M87
- Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign
- Kinematics of the M87 jet in the collimation zone: gradual acceleration and velocity stratification
- Pilot KaVA monitoring on the M87 jet: confirming the inner jet structure and superluminal motions at sub-pc scales
- Jet collimation and acceleration in the giant radio galaxy NGC 315
- Capabilities and prospects of the East Asia Very Long Baseline Interferometry Network
- Broadband Multi-wavelength Properties of M87 during the 2018 EHT Campaign including a Very High Energy Flaring Episode
- Interferometric Monitoring of Gamma-ray Bright AGNs I: Results of Single-epoch Multifrequency Observations
- J0906+6930: a radio-loud quasar in the early Universe
- Interferometric Monitoring of Gamma-ray Bright Active Galactic Nuclei II: Frequency Phase Transfer
- Evidence of jet-clump interaction: a flip of the radio jet head of 3C~84
- Spectral analysis of a parsec-scale jet in M87: Observational constraint on the magnetic field strengths in the jet
- Implications from the velocity profile of the M87 jet: a possibility of a slowly rotating black hole magnetosphere
- East Asian VLBI Network Observations of Active Galactic Nuclei Jets: Imaging with KaVA+Tianma+Nanshan
- Jet Kinematics of the Quasar 4C +21.35 from Observations with the KaVA Very Long Baseline Interferometry Array
- Overview of the Observing System and Initial Scientific Accomplishments of the East Asian VLBI Network (EAVN)
- Transverse Oscillations of the M87 Jet Revealed by KaVA Observations
- A comparative study of amplitude calibrations for East-Asia VLBI Network: a-priori and template spectrum methods
- Jet Collimation and Acceleration in the Flat Spectrum Radio Quasar 1928+738
- The Most Compact Bright Radio-loud AGN -- II. VLBA Observations of Ten Sources at 43 and 86~GHz
- Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020
- PAGaN II: The Evolution of AGN Jets on Sub-Parsec Scales
- Observational Evidence of a Centi-parsec Supermassive Black Hole Binary Existing in the Nearby Galaxy M81
- Fossil shell in 3C 84 as TeV -ray emitter and cosmic-ray accelerator
- Is Fermi 1544-0649 a misaligned blazar? discovering the jet structure with VLBI
- Super-Resolved Image of M87 Observed with East Asian VLBI Network
- VLBI observations of a flared optical quasar CGRaBS J0809+5341
- Proper Motions of Water Masers in the Star-forming Region IRAS 23139+5939
- PAGaN I: Multi-Frequency Polarimetry of AGN Jets with KVN
- Transverse Oscillations and Wave Propagation in the Magnetically Dominated M87 Jet
- First Trigonometric Parallax Measurements with the KVN and VERA Array (KaVA)
- A strong radio brightening at the jet base of M87 during the elevated very-high-energy gamma-ray state in 2012