146 citations · 235 across the 7 of their papers we have counts for
6 papers · 1 filter
A young galaxy cluster in the old Universe
Tetsuya Hashimoto, Tomotsugu Goto, Rieko Momose +4
Galaxies evolve from a blue star-forming phase into a red quiescent one by quenching their star formation activity. In high density environments, this galaxy evolution proceeds ear…
Characteristics of mid-infrared PAH emission from star-forming galaxies selected at 250 μm in the North Ecliptic Pole (NEP) field
Seong Jin Kim, Woong-Seob Jeong, Tomotsugu Goto +11
Evolutionary properties of infrared (IR) luminous galaxies are important keys to understand dust-obscured star formation history and galaxy evolution. Based on the near- to mid-IR…
Infrared luminosity functions based on 18 mid-infrared bands: revealing cosmic star formation history with AKARI and Hyper Suprime-Cam
Tomotsugu Goto, Nagisa Oi, Yousuke Utsumi +21
Much of the star formation is obscured by dust. For the complete understanding of the cosmic star formation history (CSFH), infrared (IR) census is indispensable. AKARI carried out…
Does AGN Fraction Depend on Redshift or Luminosity? An Extinction-Free Test by 18-band Mid-infrared SED Fitting in the AKARI NEP Wide Field
Chia-Ying Chiang, Tomotsugu Goto, Tetsuya Hashimoto +3
Revealing what fraction of galaxies harbor AGN is central in understanding black hole accretion history of the Universe. However, optical and soft X-ray surveys miss the most highl…
Rapid Black Hole Growth at the Dawn of the Universe: A Super-Eddington Quasar at z=6.6
Ji-Jia Tang, Tomotsugu Goto, Youichi Ohyama +7
We present the analysis of a new near-infrared (NIR) spectrum of a recently discovered quasar PSO J006+39 in an attempt to explore the early growth of supermassive black…
Possible evolution of the circum-galactic medium around QSOs with QSO age and cosmic time revealed by Ly halos
Rieko Momose, Tomotsugu Goto, Yousuke Utsumi +6
We first present new Subaru narrow-band observations of the Ly halo around the quasi-stellar object (QSO) CFHQ J232908030158 at , which appears the most luminous and…