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58 papers
Diverse Metallicities in Protoclusters at detected by Deep Learning
Yoshihiro Takeda, Nobunari Kashikawa, Kei Ito +12
We present spectroscopic follow-up observations with Subaru/MOIRCS of four protocluster candidate regions identified by the deep-learning model PCFNet. In three candidate regions,…
Probing Spatial Variations in IGM Transmission: Higher Ly Visibility in an H-Selected Galaxy Overdensity at
Shunta Shimizu, Nobunari Kashikawa, Junya Arita +13
The visibility of Ly emission during the epoch of reionization depends on both galaxy properties and the transmission of Ly photons through the intergalactic medium (IGM). Us…
Subaru meets JWST: A Direct Measurement of Ly Escape Fraction at with Dual Narrow-Band Imaging
Shunta Shimizu, Nobunari Kashikawa, Ryo Emori +15
We present a direct measurement of the Ly escape fraction, , for H emitters (HAEs) at in the JWST CEERS field by combining JWST/NIRCam F47…
Cross-correlations between the CLAMATO Lyman-alpha forest and galaxies within the COSMOS field
Benjamin Zhang, Khee-Gan Lee, Andrei Cuceu +2
We compute the 3D cross-correlation between the absorption of the Lyman-alpha forest measured by the COSMOS Lyman-Alpha Mapping And Tomography Observations (CLAMATO) su…
RIDEN pilot survey: broad-band selection of candidate quasars with extended Lyman- nebulae using CLAUDS-HSC-SSP-DUNES joint data
Rhythm Shimakawa, Satoshi Kikuta, Haruka Kusakabe +5
The Vera C. Rubin Observatory will conduct the Legacy Survey of Space and Time (LSST), delivering deep, multi-band () imaging data across 18,000 square degrees over the nex…
Subaru High- Exploration of Low-Luminosity Quasars (SHELLQs). XXIII. The powering mechanisms of the Ly haloes around high- quasars probed by slit spectroscopy
Hiroki Hoshi, Rikako Ishimoto, Nobunari Kashikawa +15
We present the analysis of Ly haloes around faint quasars at and . We use 20 and 162 quasars at and , taken by slit spectroscopy, and detect Ly…
Mining for Protoclusters at from Photometric Datasets with Deep Learning
Yoshihiro Takeda, Nobunari Kashikawa, Kei Ito +9
Protoclusters are high- overdense regions that will evolve into clusters of galaxies by , making them ideal for studying galaxy evolution expected to be accelerated by envi…
Multiple emission lines of H emitters at from the broad and medium-band photometry in the ZFOURGE Survey
Nuo Chen, Kentaro Motohara, Lee R. Spitler +8
We present a multiple emission lines study of 1300 H emitters (HAEs) at in the ZFOURGE survey. In contrast to the traditional spectroscopic method, our sample…
SILVERRUSH. XIII. A Catalog of 20,567 Ly Emitters at Identified in the Full-depth Data of the Subaru/HSC-SSP and CHORUS Surveys
Satoshi Kikuta, Masami Ouchi, Takatoshi Shibuya +13
We present 20,567 Ly emitters (LAEs) at that are photometrically identified by the SILVERRUSH program in a large survey area up to 25 deg with deep images of fiv…
Observational Evidence for Large-Scale Gas Heating in a Galaxy Protocluster at z=2.30
Chenze Dong, Khee-Gan Lee, Metin Ata +2
We report a galaxy protocluster (COSTCO-I) in the COSMOS field, where the Lyman- forest as seen in the CLAMATO IGM tomography survey does not show significant absorptio…
UV & Ly halos of Ly emitters across environments at z=2.84
Satoshi Kikuta, Yuichi Matsuda, Shigeki Inoue +7
We present UV and Ly radial surface brightness (SB) profiles of Ly emitters (LAEs) at detected with the Hyper Suprime-Cam (HSC) on the Subaru Telescope. The depth of…
The Dependence of Galaxy Properties on the Underlying 3D Matter Density Field at 2.0 < z < 2.5
Rieko Momose, Khee-Gan Lee, Benjamin Horowitz +2
We study the environmental effect of galaxy evolution as a function of the underlying 3D dark matter density for the first time at , in which the underlying matter density…
CHORUS IV: Mapping the Spatially Inhomogeneous Cosmic Reionization with Subaru HSC
Takehiro Yoshioka, Nobunari Kashikawa, Akio K. Inoue +11
The spatial inhomogeneity is one of the important features for understanding the reionization process; however, it has not yet been fully quantified. To map this inhomogeneous dist…
A systematic search for galaxy protocluster cores at the transition epoch of their star formation activity
Makoto Ando, Kazuhiro Shimasaku, Rieko Momose +3
The redshift of is the transition epoch of protoclusters (PCs) from the star-forming phase into the quenching phase, and hence an appropriate era to investigate the buil…
SILVERRUSH XI: Constraints on the Ly luminosity function and cosmic reionization at with Subaru/Hyper Suprime-Cam
Hinako Goto, Kazuhiro Shimasaku, Satoshi Yamanaka +6
The Ly luminosity function (LF) of Ly emitters (LAEs) has been used to constrain the neutral hydrogen fraction in the intergalactic medium (IGM) and thus the timeline of cosm…
SILVERRUSH. XI. Intensity Mapping for Lya Emission Extending over comoving kpc around LAEs with Subaru HSC-SSP and CHORUS Data
Shotaro Kikuchihara, Yuichi Harikane, Masami Ouchi +14
We conduct intensity mapping to probe for extended diffuse Ly emission around Ly emitters (LAEs) at , exploiting very deep ( mag at ) and large-area ($\…
Catch Me if You Can: Biased Distribution of Ly-emitting Galaxies according to the Viewing Direction
Rieko Momose, Kazuhiro Shimasaku, Kentaro Nagamine +4
We report that Ly-emitting galaxies (LAEs) may not faithfully trace the cosmic web of neutral hydrogen (HI), but their distribution is likely biased depending on the viewing dir…
SILVERRUSH X: Machine Learning-Aided Selection of LAEs at , , , , , and from the HSC SSP and CHORUS Survey Data
Yoshiaki Ono, Ryohei Itoh, Takatoshi Shibuya +25
We present a new catalog of Ly emitter (LAE) candidates at , , , , , and that are photometrically selected by the SILVERRUSH program wi…
Subaru Hyper Suprime-Cam excavates colossal over- and under-dense structures over 360 deg2 out to z=1
Rhythm Shimakawa, Yuichi Higuchi, Masato Shirasaki +8
Subaru Strategic Program with the Hyper-Suprime Cam (HSC-SSP) has proven to be successful with its extremely-wide area coverage in past years. Taking advantages of this feature, we…
Identification of AKARI infrared sources by Deep HSC Optical Survey: Construction of New Band-Merged Catalogue in the NEP-Wide field
Seong Jin Kim, Nagisa Oi, Tomotsugu Goto +21
The north ecliptic pole (NEP) field is a natural deep field location for many satellite observations. It has been targeted manytimes since it was surveyed by the AKARI space telesc…
CHORUS. I. Cosmic HydrOgen Reionization Unveiled with Subaru: Overview
Akio K. Inoue, Satoshi Yamanaka, Masami Ouchi +28
To determine the dominant sources for cosmic reionization, the evolution history of the global ionizing fraction, and the topology of the ionized regions, we have conducted a deep…
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XI. Proximity Zone Analysis for Faint Quasar Spectra at z~6
Rikako Ishimoto, Nobunari Kashikawa, Masafusa Onoue +14
We present measurements of the size of the quasar proximity zone () for eleven low-luminosity () quasars at , discovered by the Subaru H…
Probing Feedback via IGM tomography and Ly forest with Subaru PFS, TMT/ELT, and JWST
Kentaro Nagamine, Ikkoh Shimizu, Katsumi Fujita +8
In preparation for the IGM tomography study by Subaru Prime Focus Spectrograph (PFS) survey and other large future telescopes such as TMT/ELT/GMT, we present the results of our pil…
Search for Optically Dark Infrared Galaxies without Counterparts of Subaru Hyper Suprime-Cam in the AKARI North Ecliptic Pole Wide Survey Field
Yoshiki Toba, Tomotsugu Goto, Nagisa Oi +25
We present the physical properties of AKARI sources without optical counterparts in optical images from the Hyper Suprime-Cam (HSC) on the Subaru telescope. Using the AKARI infrare…