51 citations · 58 across the 7 of their papers we have counts for
8 papers
High-frequency water megamasers as precision probes of black holes, galaxies and cosmology: A case for a next-generation sub-mm/mm interferometer
Ingyin Zaw, C. M. Violette Impellizzeri, Dominic W. Pesce +8
Water megamasers in the circumnuclear disks of active galactic nuclei are among the most precise probes of supermassive black holes. VLBI imaging of 22 GHz disk masers has provided…
Black Hole Explorer Mission Development in Japan
Kazunori Akiyama, Mareki Honma, Akihiro Doi +21
The Black Hole Explorer (BHEX) is a next-generation space very-long-baseline interferometry (VLBI) mission concept that will extend existing ground-based millimeter/submillimeter V…
Compton-thick AGN Characterisation in a Multi-wavelength Context: Insights from the 70-Month \textit{SWIFT}/BAT Catalogue
Muhammad Luqman Hakeem Musa, Zamri Zainal Abidin, Masatoshi Imanishi +2
We analyse Compton-thick active galactic nuclei (CT AGNs), a heavily obscured subclass that challenges traditional X-ray diagnostics. Using 243 sources from the 70-Month \textit{SW…
ALMA Sub-parsec Resolution Dense Molecular Line Observations of the NGC 1068 Nucleus
Masatoshi Imanishi, Bernd Vollmer, Yoshiaki Hagiwara +3
We present the results of our ALMA observations of the dense molecular HCN J=4-3 and HCO J=4-3 lines at 1 pc (14 mas) resolution in the nuclear region of…
Origin of Radio Emission in Three Nearby Ultraluminous Infrared Galaxies with Signatures of Luminous Buried Active Galactic Nuclei
Takayuki J. Hayashi, Yoshiaki Hagiwara, Masatoshi Imanishi
We report multifrequency Very Long Baseline Array (VLBA) observations at 2.3 and 8.4GHz of three nearby ultraluminous infrared galaxies, identified via mid-infrared spectroscopic a…
The Japanese Vision for the Black Hole Explorer Mission
Kazunori Akiyama, Kotaro Niinuma, Kazuhiro Hada +43
The Black Hole Explorer (BHEX) is a next-generation space very long baseline interferometry (VLBI) mission concept that will extend the ground-based millimeter/submillimeter arrays…
VLBI Detection of an Active Radio Source Potentially Driving 100-kpc Scale Emission in the Ultraluminous Infrared Galaxy IRAS F010042237
Takayuki J. Hayashi, Yoshiaki Hagiwara, Masatoshi Imanishi
The nearby ultraluminous infrared galaxy (ULIRG) IRAS F010042237 exhibits 100-kpc scale continuum emission at radio wavelengths. The absence of extended X-ray emission in IRAS F…
ALMA 0.02"-resolution observations reveal HCN-abundance-enhanced counter-rotating and outflowing dense molecular gas at the NGC 1068 nucleus
Masatoshi Imanishi, Dieu D. Nguyen, Keiichi Wada +6
We present ALMA ~0.02"-resolution observations of the nucleus of the nearby (~14 Mpc) type-2 AGN NGC 1068 at HCN/HCO+/HNC J=3-2 lines, as well as at their 13C isotopologue and vibr…