activity
20032025
most citedThe Morphology - Density Relation in z ~ 1 Clusters

398 citations · 967 across the 15 of their papers we have counts for

collaborators

15 papers

astro-ph.GA2025

Merger fraction in galaxy groups and clusters at z < 0.2: A non-parametric morphological study with Subaru Hyper Suprime-Cam

Anri Yanagawa, Yoshiki Toba, Naomi Ota +7

We investigate the environmental dependence of galaxy mergers using high-resolution imaging data from the Hyper Suprime-Cam (HSC) Subaru Strategic Program. We focus on galaxy group…

astro-ph.GA2025★ 2 cited

UNIONS: The Ultraviolet Near-Infrared Optical Northern Survey

Stephen Gwyn, Alan W. McConnachie, Jean-Charles Cuillandre +86

The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is a "collaboration of collaborations" that is using the Canada-France-Hawai'i Telescope, the Pan-STARRS telescopes,…

astro-ph.GA2025

No Galaxy-Scale [CII] Fast Outflow in the z=6.72 Red Quasar HSC J12050000

Mahoshi Sawamura, Takuma Izumi, Kouichiro Nakanishi +17

HSC 120505.09-000027.9 (J12050000) is one of the highest redshift () dust-reddened quasars (red quasars) known to date. We present an improved analysis of Atacama Large…

astro-ph.GA2024

AGN properties of ~1 million member galaxies of galaxy groups and clusters at z < 1.4 based on the Subaru Hyper Suprime-Cam survey

Yoshiki Toba, Aoi Hashiguchi, Naomi Ota +17

Herein, we present the statistical properties of active galactic nuclei (AGNs) for approximately 1 million member galaxies of galaxy groups and clusters, with 0.1 cluster redsh…

astro-ph.CO2024

A Systematic Search of Distant Superclusters with the Subaru Hyper Suprime-Cam Survey

Tsung-Chi Chen, Yen-Ting Lin, Hsi-Yu Schive +13

Superclusters, encompassing environments across a wide range of overdensities, can be regarded as unique laboratories for studying galaxy evolution. Although numerous supercluster…

astro-ph.GA2023

AGN number fraction in galaxy groups and clusters at z < 1.4 from the Subaru Hyper Suprime-Cam survey

Aoi Hashiguchi, Yoshiki Toba, Naomi Ota +20

One of the key questions on active galactic nuclei (AGN) in galaxy clusters is how AGN could affect the formation and evolution of member galaxies and galaxy clusters in the histor…