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Clustering of infrared-bright dust-obscured galaxies revealed by the Hyper Suprime-Cam and WISE
Yoshiki Toba, Tohru Nagao, Masaru Kajisawa +20
We present measurements of the clustering properties of a sample of infrared (IR) bright dust-obscured galaxies (DOGs). Combining 125 deg of wide and deep optical images obtain…
Near-infrared spectroscopy of nearby Seyfert galaxies: Is there evidence for the shock excitation in narrow-line regions?
Koki Terao, Tohru Nagao, Tetsuya Hashimoto +5
One of the unsettled, important problems in active galactic nuclei (AGNs) is the major ionization mechanism of gas clouds in their narrow-line regions (NLRs). In order to investiga…
Revisiting the Completeness and the Luminosity Function in High-Redshift Low-Luminosity Quasar Surveys
Mana Niida, Tohru Nagao, Hiroyuki Ikeda +4
Recent studies have derived quasar luminosity functions (QLFs) at various redshifts. However, the faint side of the QLF at high redshifts is still too uncertain. An accurate estima…
An Effective Selection Method for Low-Mass Active Black Holes and First Spectroscopic Identification
Tomoki Morokuma, Nozomu Tominaga, Masaomi Tanaka +13
We present a new method to effectively select objects which may be low-mass active black holes (BHs) at galaxy centers using high-cadence optical imaging data, and our first spectr…
Subaru high-z exploration of low-luminosity quasars (SHELLQs). I. Discovery of 15 quasars and bright galaxies at 5.7 < z < 6.9
Yoshiki Matsuoka, Masafusa Onoue, Nobunari Kashikawa +36
We report the discovery of 15 quasars and bright galaxies at 5.7 < z < 6.9. This is the initial result from the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) projec…