362 citations · 1.6k across the 48 of their papers we have counts for
48 papers
Early-type Galaxies on the Star Formation Main Sequence: Internal Star Formation Geometry Revealed with MaNGA and Their Environmental Origin
Shuhei Koyama, Yusei Koyama, Takuji Yamashita +3
Star-forming galaxies on the main sequence (MS) are often regarded as a uniform population characterized by similar global star formation properties. However, there exists a divers…
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). X. The Massive and Passive Nature of Radio Galaxies at
Yuta Yamamoto, Tohru Nagao, Takuji Yamashita +8
High- radio galaxies (HzRGs) are considered important objects for understanding the formation and evolution of massive galaxies in the early universe. However, till date, detail…
New technique to select recent fast-quenching galaxies at using the optical colors
Mariko Kubo, Tohru Nagao, Hisakazu Uchiyama +4
Many massive quiescent galaxies have been discovered at thanks to multi-wavelength deep and wide surveys, however, substantial deep near-infrared spectroscopic observations a…
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…
GREX-PLUS Science Book
PLUS Science Team, Akio K. Inoue, Yuichi Harikane +28
GREX-PLUS (Galaxy Reionization EXplorer and PLanetary Universe Spectrometer) is a mission candidate for a JAXA's strategic L-class mission to be launched in the 2030s. Its primary…
Quasar Luminosity Function at z = 7
Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa +41
We present the quasar luminosity function (LF) at , measured with 35 spectroscopically confirmed quasars at . The sample of 22 quasars from the Subaru High-…
eROSITA Final Equatorial-Depth Survey (eFEDS): eFEDS X-ray view of WERGS Radio Galaxies selected by the Subaru/HSC and VLA/FIRST survey
Kohei Ichikawa, Takuji Yamashita, Andrea Merloni +19
We construct the eROSITA X-ray catalog of radio galaxies discovered by the WERGS survey that is made by the cross-matching of the wide-area Subaru/HSC optical survey and VLA/FIRST…
Massive molecular gas companions uncovered by VLA CO(1-0) observations of the = 5.2 radio galaxy TN J09242201
Kianhong Lee, Kotaro Kohno, Bunyo Hatsukade +9
We present Karl G. Jansky Very Large Array (VLA) K-band (19 GHz) observations of the redshifted CO(1-0) line emission toward the radio galaxy TN J09242201 at , which is o…
Extreme nature of four blue-excess dust-obscured galaxies revealed by optical spectroscopy
Akatoki Noboriguchi, Tohru Nagao, Yoshiki Toba +13
We report optical spectroscopic observations of four blue-excess dust-obscured galaxies (BluDOGs) identified by Subaru Hyper Suprime-Cam. BluDOGs are a sub-class of dust-obscured g…
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IX. The Most Overdense Region at z~5 Inhabited by a Massive Radio Galaxy
Hisakazu Uchiyama, Takuji Yamashita, Tohru Nagao +13
We report on the galaxy density environment around a high-z radio galaxy (HzRG) at z=4.72, HSC J083913.17+011308.1 (HSC J0839+0113), probed using an r-dropout Lyman break galaxy (L…
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VII. Redshift Evolution of Radio Galaxy Environments at z=0.3-1.4
Hisakazu Uchiyama, Takuji Yamashita, Tohru Nagao +9
We examine the redshift evolution of density environments around 2,163 radio galaxies with the stellar masses of between redshifts of , base…
Detection of extended millimeter emission in the host galaxy of 3C273 and its implications for QSO feedback via high dynamic range ALMA imaging
Shinya Komugi, Yoshiki Toba, Yoshiki Matsuoka +2
We estimate the amount of negative feedback energy injected into the ISM of the host galaxy of 3C273, a prototypical radio loud quasar. We obtained 93, 233 and 343 GHz continuum im…
Multi-wavelength and Multi-CO View of The Minor Merger Driven Star Formation in the Nearby LIRG NGC 3110
Yuka Kawana, Toshiki Saito, Sachiko K. Okumura +12
We present Atacama Large Millimeter/submillimeter Array observations of multiple CO(1-0), CO(1-0), and CO(1-0) lines and 2.9 mm and 1.3 mm continuum emission toward t…
Multi-line assessment of narrow-line regions in 3 radio galaxies
Koki Terao, Tohru Nagao, Kyoko Onishi +4
In this paper, we utilize high-quality rest-UV spectra of three radio galaxies at 3 observed with VLT/FORS2 to measure the flux of several emission lines including relativ…
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VI. Distant Filamentary Structures Pointed by High-z Radio Galaxies at z~4
Hisakazu Uchiyama, Takuji Yamashita, Jun Toshikawa +13
We present the environmental properties around high- radio galaxies (HzRGs) at , which have been poorly investigated because of their rarity. We use the largest samples…
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XVI. 69 New Quasars at 5.8 < z < 7.0
Yoshiki Matsuoka, Kazushi Iwasawa, Masafusa Onoue +41
We present the spectroscopic discovery of 69 quasars at 5.8 < z < 7.0, drawn from the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey data. This is the 16th p…
Cold Molecular Gas in Merger Remnants. II. The properties of dense molecular gas
Junko Ueda, Daisuke Iono, Min S. Yun +7
We present the 3 mm wavelength spectra of 28 local galaxy merger remnants obtained with the Large Millimeter Telescope. Fifteen molecular lines from 13 different molecular species…
Third Data Release of the Hyper Suprime-Cam Subaru Strategic Program
Hiroaki Aihara, Yusra AlSayyad, Makoto Ando +64
The paper presents the third data release of Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP), a wide-field multi-band imaging survey with the Subaru 8.2m telescope. HSC-SSP ha…
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super-)Massive Black Holes in Extremely Radio-Loud Galaxies
Kohei Ichikawa, Takuji Yamashita, Yoshiki Toba +19
We present the optical and infrared properties of 39 extremely radio-loud galaxies discovered by cross-matching the Subaru/Hyper Suprime-Cam (HSC) deep optical imaging survey and V…
An ACA Survey of [CI] , CO , and Dust Continuum in Nearby U/LIRG
Tomonari Michiyama, Toshiki Saito, Ken-ichi Tadaki +11
We present the results of surveying [CI] , CO , and 630 m dust continuum emission for 36 nearby ultra/luminous infrared galaxies (U/LIRGs) using the B…
Do gas clouds in narrow-line regions of Seyfert galaxies come from their nuclei?
Kazuma Joh, Tohru Nagao, Keiichi Wada +2
The narrow-line region (NLR) consists of gas clouds ionized by the strong radiation from the active galactic nucleus (AGN), distributed in the spatial scale of AGN host galaxies. T…
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…
Follow-up Observations for IceCube-170922A: Detection of Rapid Near-Infrared Variability and Intensive Monitoring of TXS 0506+056
Tomoki Morokuma, Yousuke Utsumi, Kouji Ohta +35
We present our follow-up observations to search for an electromagnetic counterpart of the IceCube high-energy neutrino, IceCube-170922A. Monitoring observations of a likely counter…