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

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Showing 2012Show all

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astro-ph.CO2012★ 38 cited

Constraints on the faint end of the quasar luminosity function at z~5 in the COSMOS field

H. Ikeda, T. Nagao, K. Matsuoka +12

We present the result of our low-luminosity quasar survey in the redshift range of 4.5 < z < 5.5 in the COSMOS field. Using the COSMOS photometric catalog, we selected 15 quasar ca…

astro-ph.CO2012★ 13 cited

Near-infrared spectroscopy of a nitrogen-loud quasar SDSS J1707+6443

N. Araki, T. Nagao, K. Matsuoka +6

We present near-infrared spectroscopy of the z=3.2 quasar SDSS J1707+6443, obtained with MOIRCS on the Subaru Telescope. This quasar is classified as a "nitrogen-loud" quasar becau…