1.9k citations · 17.2k across the 144 of their papers we have counts for
9 papers · 1 filter
Jet collimation and acceleration in the giant radio galaxy NGC 315
Jongho Park, Kazuhiro Hada, Masanori Nakamura +3
We study the collimation and acceleration of the jets in the nearby giant radio galaxy NGC 315, using multifrequency Very Long Baseline Array observations and archival High Sensiti…
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…
Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope
Maciek Wielgus, Kazunori Akiyama, Lindy Blackburn +26
The Event Horizon Telescope (EHT) has recently delivered the first resolved images of M87*, the supermassive black hole in the center of the M87 galaxy. These images were produced…
Millimeter-VLBI Detection and Imaging of the Gravitationally Lensed Gamma-Ray Blazar JVAS B0218+357
Kazuhiro Hada, Kotaro Niinuma, Julian Sitarek +2
We observed the gravitationally lensed blazar JVAS B0218+357 with the KVN and VERA Array (KaVA) at 22, 43, and 86 GHz. The source has recently been identified as an active gamma-ra…
Linear polarization in the nucleus of M87 at 7 mm and 1.3 cm
E. V. Kravchenko, M. Giroletti, K. Hada +4
We report on high angular resolution polarimetric observations of the nearby radio galaxy M87 using the Very Long Baseline Array at 24 GHz (1.3 cm) and 43 GHz (7 mm) in 201…
The radio-loud narrow-line Seyfert 1 galaxy 1H 0323+342 in a galaxy merger
Akihiro Doi, Motoki Kino, Nozomu Kawakatu +1
The supermassive black holes (SMBHs) of narrow-line Seyfert 1 galaxies (NLS1s) are at the lowest end of mass function of active galactic nuclei (AGNs) and preferentially reside in…