681 citations · 1.9k across the 35 of their papers we have counts for
35 papers
Low-Frequency VLBI Network Using SKA-LOW
Hideyuki Kobayashi, Tomoaki Oyama, Kazuma Fujita +17
We propose the development of a low-frequency Very Long Baseline Interferometry (VLBI) network operating in the 100-350 MHz range, incorporating the Square Kilometre Array Low (SKA…
First Sagittarius A* Event Horizon Telescope Results. VI: Testing the Black Hole Metric
The Event Horizon Telescope Collaboration
Astrophysical black holes are expected to be described by the Kerr metric. This is the only stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies…
Precessing jet nozzle connecting to a spinning black hole in M87
Yuzhu Cui, Kazuhiro Hada, Tomohisa Kawashima +76
The nearby radio galaxy M87 offers a unique opportunity to explore the connections between the central supermassive black hole and relativistic jets. Previous studies of the inner…
Detection of a ~ 0.1c radio knot in M81* associated with a moderate X-ray flare
Xuezheng Wang, Wu Jiang, Zhiqiang Shen +4
Through very long baseline interferometry observations of one of the closest low-luminosity active galactic nuclei M81* at multifrequencies of 8.8, 22 and 44GHz, a bright discrete…
Kinematics and Collimation of the Two-Sided Jets in NGC 4261: VLBI Study on Sub-parsec Scales
Xi Yan, Ru-Sen Lu, Wu Jiang +2
We report multi-frequency VLBI studies of the sub-parsec scale structure of the two-sided jet in the nearby radio galaxy NGC 4261. Our analyses include new observations using the S…
A search for pulsars around Sgr A* in the first Event Horizon Telescope dataset
Pablo Torne, Kuo Liu, Ralph P. Eatough +282
The Event Horizon Telescope (EHT) observed in 2017 the supermassive black hole at the center of the Milky Way, Sagittarius A* (Sgr A*), at a frequency of 228.1 GHz (=1.3 mm). Th…
Spectral analysis of a parsec-scale jet in M87: Observational constraint on the magnetic field strengths in the jet
Hyunwook Ro, Motoki Kino, Bong Won Sohn +49
Because of its proximity and the large size of its black hole, M87 is one of the best targets for studying the launching mechanism of active galactic nucleus jets. Currently, magne…
Comparison of Polarized Radiative Transfer Codes used by the EHT Collaboration
Cora Prather, Jason Dexter, Monika Moscibrodzka +270
Interpretation of resolved polarized images of black holes by the Event Horizon Telescope (EHT) requires predictions of the polarized emission observable by an Earth-based instrume…
Radio continuum and OH line emission of high-z OH megamaser galaxies
Zhongzu Wu, Yu. V. Sotnikova, Bo Zhang +8
We present the study of arcsecond scale radio continuum and OH line emission of a sample of known OH megamaser galaxies with 0.15 using archival Very Large Array (VLA) dat…
Impact of the nonthermal electron radiation effects on the horizon scale image structure of Sagittarius A*
Shan-Shan Zhao, Lei Huang, Rusen Lu +1
The Event Horizon Telescope (EHT), with 20 as high angular resolution, recently resolved the millimeter image of the suppermassive black hole in the Galaxy, Sagittarius A*…
Multi-frequency VLBI Observations of the M 84 Inner Jet/Counterjet
Xuezheng Wang, Wu Jiang, Zhiqiang Shen +4
Observational studies of inner-most regions of the edge-on jets in nearby active galactic nuclei (AGN) are crucial to understand their kinematics and morphology. For the inner jet…
The radio structure of the -ray narrow-line Seyfert 1 galaxy SDSS J211852.96073227.5
Xi Shao, Minfeng Gu, Yongjun Chen +4
The -ray narrow-line Seyfert 1 (NLS1) galaxies can be considered to be the third class of -ray active galactic nuclei possessing relativistic jets. In this paper, we present…
Radio properties of the OH megamaser galaxy IIZw 096
Hong Wu, Zhongzu Wu, Yu. Sotnikova +9
Based on the two epochs EVN archive data from OH line observations of IIZw 096, we confirm that the high-resolution OH emission in this source mainly comes from two spots (OH1 and…
CHANG-ES. XXIV. First Detection of A Radio Nuclear Ring and Potential LLAGN in NGC 5792
Yang Yang, Judith Irwin, Jiangtao Li +8
We report the discoveries of a nuclear ring of diameter 10$\arcsec$ (1.5 kpc) and a potential low luminosity active galactic nucleus (LLAGN) in the radio continuum emission m…
Millimeter-VLBI observations of low-luminosity active galactic nuclei with source-frequency phase-referencing
Wu Jiang, Zhiqiang Shen, Ivan Marti-Vidal +3
We report millimeter-VLBI results of low-luminosity active galactic nuclei (M 84 and M 87) up to 88 GHz with source-frequency phase-referencing observations. We detected the weak V…
Event Horizon Telescope observations of the jet launching and collimation in Centaurus A
Michael Janssen, Heino Falcke, Matthias Kadler +236
Very-long-baseline interferometry (VLBI) observations of active galactic nuclei at millimeter wavelengths have the power to reveal the launching and initial collimation region of e…
FAST discovery of an extremely radio-faint millisecond pulsar from the Fermi-LAT unassociated source 3FGL J0318.1+0252
Pei Wang, Di Li, Colin J. Clark +23
High sensitivity radio searches of unassociated -ray sources have proven to be an effective way of finding new pulsars. Using the Five-hundred-meter Aperture Spherical radio Tel…
Polarimetric properties of Event Horizon Telescope targets from ALMA
Ciriaco Goddi, Ivan Marti-Vidal, Hugo Messias +31
We present the results from a full polarization study carried out with ALMA during the first VLBI campaign, which was conducted in Apr 2017 in the 3mm and 1.3mm bands, in con…
The TMRT K Band Observations towards 26 Infrared Dark Clouds: NH, CCS, and HCN
Jinjin Xie, Gary A. Fuller, Di Li +9
We present one of the first Shanghai Tian Ma Radio Telescope (TMRT) K Band observations towards a sample of 26 infrared dark clouds (IRDCs). We observed the (1,1), (2,2), (3,3), an…
The Changing Look Blazar B2 1420+32
Hora D. Mishra, Xinyu Dai, Ping Chen +22
Blazars are active galactic nuclei with their relativistic jets pointing toward the observer, with two major sub-classes, the flat spectrum radio quasars and BL Lac objects. We pre…
DR 21 South Filament: a Parsec-sized Dense Gas Accretion Flow onto the DR 21 Massive Young Cluster
Bo Hu, Keping Qiu, Yue Cao +8
DR21 south filament (DR21SF) is a unique component of the giant network of filamentary molecular clouds in the north region of Cygnus X complex. Unlike the highly fragmented and st…
Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
Dimitrios Psaltis, Lia Medeiros, Pierre Christian +185
The 2017 Event Horizon Telescope (EHT) observations of the central source in M87 have led to the first measurement of the size of a black-hole shadow. This observation offers a new…
Space VLBI 2020: Science and Technology Futures Conference Summary
T. Joseph W. Lazio, Walter Brisken, Katherine Bouman +8
The "Space VLBI 2020: Science and Technology Futures" meeting was the second in The Future of High-Resolution Radio Interferometry in Space series. The first meeting (2018 Septembe…
The radio properties of the OH megamaser galaxy IRAS 02524+2046
Hao Peng, Zhongzu Wu, Bo Zhang +7
We present results from VLBI observations of continuum and OH line emission in IRAS 02524+2046 and also arcsecond-scale radio properties of this galaxy using VLA archive data. We f…