105 citations · 1.6k across the 80 of their papers we have counts for
7 papers · 1 filter
NuSTAR Discovery of a Compton-thick Dust-obscured Galaxy WISE J0825+3002
Yoshiki Toba, Satoshi Yamada, Yoshihiro Ueda +6
We report the discovery of a Compton-thick (CT) dust-obscured galaxy (DOG) at = 0.89, WISE J082501.48+300257.2 (WISE0825+3002), observed by Nuclear Spectroscopic Telescope Arra…
Multi-Epoch Modeling of TXS 0506+056 and Implications for Long-Term High-Energy Neutrino Emission
Maria Petropoulou, Kohta Murase, Marcos Santander +11
The IceCube report of a excess of neutrino events in the direction of the blazar TXS 05056+056 in 2014-2015 and the 2017 detection of a high-energy neutrino, I…
NuSTAR Discovery of Dead Quasar Engine in Arp 187
Kohei Ichikawa, Taiki Kawamuro, Megumi Shidatsu +7
Recent active galactic nucleus (AGN) and quasar surveys have revealed a population showing rapid AGN luminosity variability by a factor of . Here we present the most drasti…
A NuSTAR and XMM-Newton Study of the Two Most Actively Star-forming Green Pea Galaxies (SDSS J0749+3337 and SDSS J0822+2241)
Taiki Kawamuro, Yoshihiro Ueda, Kohei Ichikawa +4
We explore X-ray evidence for the presence of active galactic nuclei (AGNs) in the two most actively star-forming Green Pea galaxies (GPs), SDSS J0749+3337 and SDSS J0822+2241, whi…
X-Ray Spectral Model from Clumpy Torus and Its Application to Circinus Galaxy
Atsushi Tanimoto, Yoshihiro Ueda, Hirokazu Odaka +3
We construct an X-ray spectral model from the clumpy torus in an active galactic nucleus (AGN), designated as "XCLUMPY", utilizing the Monte Carlo simulation for Astrophysics and C…
A Chandra and ALMA Study of X-ray-irradiated Gas in the Central ~100 pc of the Circinus Galaxy
Taiki Kawamuro, Takuma Izumi, Masatoshi Imanishi
We report a study of X-ray-irradiated gas in the central ~100 pc of the Circinus galaxy, hosting a Compton-thick active galactic nucleus (AGN), at 10-pc resolution using Chandra an…
Luminosity Ratio between [O IV] 25.89 um Line and Nuclear Continuum 12 um as Diagnostic for "Buried" AGN
Satoshi Yamada, Yoshihiro Ueda, Atsushi Tanimoto +3
We propose new diagnostics that utilize the [O IV] 25.89 m and nuclear (subarcsecond scale) 12 m luminosity ratio for identifying whether an AGN is deeply `buried' in their s…