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The Power of Simultaneous Multi-frequency Observations for mm-VLBI: Beyond Frequency Phase Transfer
Guang-Yao Zhao, Juan Carlos Algaba, Sang-Sung Lee +15
Atmospheric propagation effects at millimeter wavelengths can significantly alter the phases of radio signals and reduce the coherence time, putting tight constraints on high frequ…
A comparative study of amplitude calibrations for East-Asia VLBI Network: a-priori and template spectrum methods
Ilje Cho, Taehyun Jung, Guang-Yao Zhao +11
We present the results of comparative study of amplitude calibrations for East-Asia VLBI Network (EAVN) at 22 and 43 GHz using two different methods of an "a-priori" and a "templat…
Ionized Gas Kinematics along the Large-Scale Radio Jets in Type 2 AGNs
Huynh Anh N. Le, Jong-Hak Woo, Donghoon Son +4
To investigate the connection between radio activity and AGN outflows, we present a study of ionized gas kinematics based on [O III] 5007 emission line along the large-scale rad…
The Science Case for Simultaneous mm-Wavelength Receivers in Radio Astronomy
Richard Dodson, María J. Rioja, Taehyun Jung +6
This review arose from the European Radio Astronomy Technical Forum (ERATec) meeting held in Firenze, October 2015, and aims to highlight the breadth and depth of the high-impact s…
Pilot KaVA monitoring on the M87 jet: confirming the inner jet structure and superluminal motions at sub-pc scales
Kazuhiro Hada, Jong Ho Park, Motoki Kino +34
We report the initial results of our high-cadence monitoring program on the radio jet in the active galaxy M87, obtained by the KVN and VERA Array (KaVA) at 22 GHz. This is a pilot…
White Paper on East Asian Vision for mm/submm VLBI: Toward Black Hole Astrophysics down to Angular Resolution of 1~R
K. Asada, M. Kino, M. Honma +35
This White Paper details the intentions and plans of the East Asian Very Long Baseline Interferometry (VLBI) community for pushing the frontiers of millimeter/submillimeter VLBI. T…
J0906+6930: a radio-loud quasar in the early Universe
Yingkang Zhang, Tao An, Sandor Frey +9
Radio-loud high-redshift quasars (HRQs), although only a few of them are known to date, are crucial for the studies of the growth of supermassive black holes (SMBHs) and the evolut…
Korean VLBI Network Calibrator Survey (KVNCS): 1. Source Catalog Of KVN Single Dish Flux Density Measurement In The K And Q Bands
Jeong Ae Lee, Bong Won Sohn, Taehyun Jung +2
We present the catalog of the KVN Calibrator Survey (KVNCS). This first part of the KVNCS is a single dish radio survey conducted at 22 (K band) and 43 GHz (Q band) simultaneously…