22 citations · 83 across the 6 of their papers we have counts for
10 papers
What determines the HI gas content in galaxies?: morphological dependence of the HI gas fraction across M*-SFR plane
Shigeru V. Namiki, Yusei Koyama, Shuhei Koyama +5
We perform a stacking analysis of the HI spectra from the Arecibo Legacy Fast ALFA (ALFALFA) survey for optically-selected local galaxies from the Sloan Digital Sky Survey (SDSS) t…
A phase-space view of cold-gas properties of Virgo-cluster galaxies: multiple quenching processes at work?
Kana Morokuma-Matsui, Tadayuki Kodama, Tomoki Morokuma +5
We investigate the cold-gas properties of massive Virgo galaxies ( M) at ( is the radius where the mean interior density is 200 times the critic…
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). IX. Identification of Two Red Quasars at z > 5.6
Nanako Kato, Yoshiki Matsuoka, Masafusa Onoue +14
We present the first discovery of dust-reddened quasars (red quasars) in the high-z universe (z >5.6). This is a result from the Subaru High-z Exploration of Low-Luminosity Quasars…
Subaru Hyper Suprime-Cam View of Quasar Host Galaxies at z < 1
Toru Ishino, Yoshiki Matsuoka, Shuhei Koyama +12
Active galactic nuclei (AGNs) are key for understanding the coevolution of galaxies and supermassive black holes (SMBHs). AGN activity is thought to affect the properties of their…
Do Galaxy Morphologies Really Affect the Efficiency of Star Formation during the Phase of Galaxy Transition?
Shuhei Koyama, Yusei Koyama, Takuji Yamashita +11
Recent simulations predict that the presence of stellar bulge suppress the efficiency of star formation in early-type galaxies, and this `morphological quenching' scenario is suppo…
Discovery of the First Low-Luminosity Quasar at z > 7
Yoshiki Matsuoka, Masafusa Onoue, Nobunari Kashikawa +45
We report the discovery of a quasar at z = 7.07, which was selected from the deep multi-band imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.…