activity
20092024
most citedA statistical relation between the X-ray spectral index and Eddington ratio of active galactic nuclei in deep surveys

214 citations · 1.6k across the 43 of their papers we have counts for

collaborators
Showing 2017Show all

5 papers · 1 filter

astro-ph.HE2017★ 46 cited

ALMA Twenty-six arcmin Survey of GOODS-S at One-millimeter (ASAGAO): X-ray AGN Properties of Millimeter-Selected Galaxies

Y. Ueda, B. Hatsukade, K. Kohno +33

We investigate the X-ray active galactic nucleus (AGN) properties of millimeter galaxies in the Great Observatories Origins Deep Survey South (GOODS-S) field detected with the Atac…

astro-ph.GA2017★ 21 cited

Chemical enrichment and accretion of nitrogen-loud quasars

Kenta Matsuoka, Tohru Nagao, Roberto Maiolino +3

We present rest-frame optical spectra of 12 nitrogen-loud quasars at z ~ 2.2, whose rest-frame ultraviolet (UV) spectra show strong nitrogen broad emission lines. To investigate th…

astro-ph.GA2017★ 6 cited

An Optically Faint Quasar Survey at z~5 in the CFHTLS Wide Field: Estimates of the Black Hole Masses and Eddington Ratios

H. Ikeda, T. Nagao, K. Matsuoka +5

We present the result of our spectroscopic follow-up observation for faint quasar candidates at z~5 in a part of the Canada-France-Hawaii Telescope Legacy Survey wide field. We sel…

astro-ph.GA2017★ 19 cited

Active Galactic Nuclei with a Low-Metallicity Narrow-Line Region

Kota Kawasaki, Tohru Nagao, Yoshiki Toba +2

Low-metallicity active galactic nuclei (AGNs) are interesting to study the early phase of the AGN evolution. However most AGNs are chemically matured and accordingly low-metallicit…

astro-ph.GA2017★ 2 cited

Nature of hard X-ray (3-24 keV) detected luminous infrared galaxies in the COSMOS field

Kenta Matsuoka, Yoshihiro Ueda

We investigate the nature of far-infrared (70 um) and hard X-ray (3-24 keV) selected galaxies in the COSMOS field detected with both Spitzer and Nuclear Spectroscopic Telescope Arr…