Valency Hub
alphaFeedback
NK

N. Kashikawa

0000-0003-3954-4219
astro-ph.GAastro-phastro-ph.COastro-ph.HEastro-ph.IMastro-ph.EPastro-ph.SR

On Valency

published · living versions
W_e6dcd5te·v1 · currentpublished
The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
with N. Suzuki, D. Rubin, C. Lidman, G. Aldering +60
1 version

Preprints & journals

197 papers in the corpus · 1998–2026
Probing Spatial Variations in IGM Transmission: Higher Lyα\alpha Visibility in an Hα\alpha-Selected Galaxy Overdensity at z≃6.2z\simeq6.22609.35221v1 · Shunta Shimizu, Nobunari Kashikawa, Junya Arita et al.2026 · 0 citationsarXiv
SHELLQs. Black Hole Mass and Eddington Ratio Distributions of Intermediate-Luminosity Quasars at 6<z<72609.09266v1 · Masafusa Onoue, John D. Silverman, Yoshiki Matsuoka et al.2026 · 0 citationsarXiv
H I Absorbers as Beacons of Hidden Structure at z∼3z \sim 3: Multi-Component, Metal-Rich Absorption System near a Protocluster2609.04349v1 · Kentaro Koretomo, Nobunari Kashikawa, Toru Misawa et al.2026 · 0 citationsarXiv
Subaru meets JWST: A Direct Measurement of Lyα\boldsymbol{\alpha} Escape Fraction at z≃6.2\boldsymbol{z\simeq6.2} with Dual Narrow-Band Imaging2607.08264v1 · Shunta Shimizu, Nobunari Kashikawa, Ryo Emori et al.2026 · 0 citationsarXiv
Subaru High-zz Exploration of Low-Luminosity Quasars (SHELLQs). XXV. Large-scale environments of low-luminosity quasars at z∼6z\sim6 traced by Lyα\alpha emitters2602.11736v2 · Junya Arita, Nobunari Kashikawa, Yoshiki Matsuoka et al.2026 · 0 citationsarXiv
SHELLQs-JWST: Revealing the Spectra of Extended Emission in 12 z > 6 Quasar Host Galaxies using the JWST NIRSpec Fixed Slit2510.22403v1 · Camryn L. Phillips, Michael A. Strauss, Masafusa Onoue et al.2025 · 4 citationsarXiv
HST Confirms Sub-5 kpc Dual Quasar Pairs at Cosmic Noon2510.09059v2 · Qian Wang, Xuheng Ding, John Silverman et al.2025 · 3 citationsarXiv
Serendipitous Discovery of an Optically-Dark Ultra-Luminous Infrared Galaxy at zz = 3.42510.00590v1 · N. H. Hayatsu, Zhi-Yu Zhang, R. J. Ivison et al.2025 · 0 citationsarXiv
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XXIV. 54 New Quasars and Candidate Obscured Quasars at 5.71≤z≤7.025.71 \le z \le 7.022508.21229v2 · Yoshiki Matsuoka, Kazushi Iwasawa, Masafusa Onoue et al.2025 · 0 citationsApJS 280, 68 (2025)
SHELLQs-JWST perspective on the intrinsic mass relation between supermassive black holes and their host galaxies at z > 62507.23066v2 · John Silverman, Junyao Li, Xuheng Ding et al.2025 · 15 citationsarXiv
Age dependence of Ly\alpha\ escape fraction of Ly\alpha\ emitters and their significant role in cosmic reionization2506.03242v2 · Shunta Shimizu, Nobunari Kashikawa, Satoshi Kikuta et al.2025 · 6 citationsMon Not R Astron Soc (2025) 3125-3143
SHELLQs. Bridging the Gap: JWST Unveils Obscured Quasars in the Most Luminous Galaxies at z > 62505.04825v3 · Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa et al.2025 · 13 citationsApJ 988, 57 (2025)
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) XXII. Chandra observations of narrow-line quasar candidates at z>62505.04826v3 · K. Iwasawa, R. Gilli, F. Vito et al.2025 · 1 citationarXiv
SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars at z>62505.03876v2 · Xuheng Ding, Masafusa Onoue, John D. Silverman et al.2025 · 11 citations2025ApJ, 993, 91D
Subaru High-zz Exploration of Low-Luminosity Quasars (SHELLQs). XXIII. The powering mechanisms of the Lyα\alpha haloes around high-zz quasars probed by slit spectroscopy2504.05984v1 · Hiroki Hoshi, Rikako Ishimoto, Nobunari Kashikawa et al.2025 · 0 citationsarXiv
Predicting Lyα\alpha Emission from Distant Galaxies with Neural Network Architecture2412.14676v1 · Takehiro Yoshioka, Nobunari Kashikawa, Yoshihiro Takeda et al.2024 · 0 citationsarXiv
Mining for Protoclusters at z∼4z\sim4 from Photometric Datasets with Deep Learning2411.11956v1 · Yoshihiro Takeda, Nobunari Kashikawa, Kei Ito et al.2024 · 0 citationsarXiv
The nature of low-luminosity AGNs discovered by JWST based on clustering analysis: progenitors of low-zz quasars?2410.08707v2 · Junya Arita, Nobunari Kashikawa, Masafusa Onoue et al.2024 · 20 citationsarXiv
A Post-Starburst Pathway for the Formation of Massive Galaxies and Black Holes at z>62409.07113v2 · Masafusa Onoue, Xuheng Ding, John D. Silverman et al.2024 · 25 citationsarXiv
JWST, ALMA, and Keck Spectroscopic Constraints on the UV Luminosity Functions at z~7-14: Clumpiness and Compactness of the Brightest Galaxies in the Early Universe2406.18352v2 · Yuichi Harikane, Akio K. Inoue, Richard S. Ellis et al.2024 · 102 citationsarXiv
MAMMOTH-Subaru. II. Diverse Populations of Circumgalactic Lyα\alpha Nebulae at Cosmic Noon2405.13113v2 · Mingyu Li, Haibin Zhang, Zheng Cai et al.2024 · 10 citationsarXiv
Discovery of merging twin quasars at z = 6.052405.02465v1 · Yoshiki Matsuoka, Takuma Izumi, Masafusa Onoue et al.2024 · 19 citationsThe Astrophysical Journal Letters, Volume 965, Issue 1, id.L4, 8 pp (2024)
Galaxy properties from the outskirts to the core of a protocluster at z=3.6992404.15910v1 · Jun Toshikawa, Stijn Wuyts, Nobunari Kashikawa et al.2024 · 0 citationsarXiv
Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg2^2 Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM HI2404.15963v2 · Yongming Liang, Masami Ouchi, Dongsheng Sun et al.2024 · 2 citationsarXiv
Black hole mass and Eddington ratio distributions of less-luminous quasars at z∼4z\sim4 in the Subaru Hyper Suprime-Cam Wide field2311.08922v1 · Wanqiu He, Masayuki Akiyama, Motohiro Enoki et al.2023 · 1 citationarXiv
Subaru High-zz Exploration of Low-luminosity Quasars (SHELLQs). XVII. Black Hole Mass Distribution at z∼6z \sim 6 Estimated via Spectral Comparison with Low-zz Quasars2310.12222v1 · Ayumi Takahashi, Yoshiki Matsuoka, Masafusa Onoue et al.2023 · 0 citationsarXiv
An enhanced abundance of bright galaxies in protocluster candidates at z~3-52310.08525v1 · Jun Toshikawa, Stijn Wuyts, Nobunari Kashikawa et al.2023 · 18 citationsarXiv
Subaru High-zz Exploration of Low-Luminosity Quasars (SHELLQs). XVIII. The Dark Matter Halo Mass of Quasars at z∼6z\sim62307.02531v1 · Junya Arita, Nobunari Kashikawa, Yoshiki Matsuoka et al.2023 · 0 citationsarXiv
Quasar Luminosity Function at z = 72305.11225v1 · Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa et al.2023 · 66 citationsarXiv
SILVERRUSH. XIII. A Catalog of 20,567 Lyα\alpha Emitters at z=2−7z=2-7 Identified in the Full-depth Data of the Subaru/HSC-SSP and CHORUS Surveys2305.08921v2 · Satoshi Kikuta, Masami Ouchi, Takatoshi Shibuya et al.2023 · 20 citationsarXiv
Updated measurements of [O III] 88 μ\mum, [C II] 158 μ\mum, and Dust Continuum Emission from a z=7.2 Galaxy2302.02365v2 · Yi W. Ren, Yoshinobu Fudamoto, Akio K. Inoue et al.2023 · 12 citationsarXiv
COSMOS2020: Discovery of a protocluster of massive quiescent galaxies at z=2.77z=2.772301.08845v1 · Kei Ito, Masayuki Tanaka, Francesco Valentino et al.2023 · 51 citationsarXiv
MAMMOTH-Subaru III. Lyα\alpha Halo Extended to ∼200\sim200 kpc Identified by Stacking ∼3300\sim 3300 Lyα\alpha Emitters at z=2.2−2.3z=2.2-2.32301.07358v1 · Haibin Zhang, Zheng Cai, Yongming Liang et al.2023 · 0 citationsarXiv
MAMMOTH-Subaru IV. Large Scale Structure and Clustering Analysis of Lyα\alpha Emitters and Lyα\alpha Blobs at z=2.2−2.3z=2.2-2.32301.07359v2 · Haibin Zhang, Zheng Cai, Mingyu Li et al.2023 · 7 citationsarXiv
MAMMOTH-Subaru V. Effects of Cosmic Variance on Lyα\alpha Luminosity Functions at z=2.2−2.3z=2.2-2.32301.07360v1 · Ke Ma, Haibin Zhang, Zheng Cai et al.2023 · 6 citationsarXiv
X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z=6.562211.13820v1 · Julien Wolf, Kirpal Nandra, Mara Salvato et al.2022 · 18 citationsA&A 669, A127 (2023)
The physical origin for spatially large scatter of IGM opacity at the end of reionization: the IGM Lyα\alpha opacity-galaxy density relation2207.05098v1 · Rikako Ishimoto, Nobunari Kashikawa, Daichi Kashino et al.2022 · 18 citationsarXiv
Exploratory Study of Transverse Proximity Effect around BAL Quasars2206.10871v1 · Toru Misawa, Rikako Ishimoto, Satoshi Kobu et al.2022 · 2 citationsarXiv
CHORUS IV: Mapping the Spatially Inhomogeneous Cosmic Reionization with Subaru HSC2201.07261v1 · Takehiro Yoshioka, Nobunari Kashikawa, Akio K. Inoue et al.2022 · 13 citationsarXiv
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VI. Distant Filamentary Structures Pointed by High-z Radio Galaxies at z~42112.01684v1 · Hisakazu Uchiyama, Takuji Yamashita, Jun Toshikawa et al.2021 · 13 citationsarXiv
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XVI. 69 New Quasars at 5.8 < z < 7.02111.12766v1 · Yoshiki Matsuoka, Kazushi Iwasawa, Masafusa Onoue et al.2021 · 61 citationsarXiv
The SSA22 HI Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog2110.11977v3 · Ken Mawatari, Akio K. Inoue, Toru Yamada et al.2021 · 4 citationsarXiv
Where's Swimmy?: Mining unique color features buried in galaxies by deep anomaly detection using Subaru Hyper Suprime-Cam data2110.05011v2 · Takumi S. Tanaka, Rhythm Shimakawa, Kazuhiro Shimasaku et al.2021 · 9 citationsPASJ 74 (2022) 1-23
Ionizing radiation from AGNs at z>3.3 with the Subaru Hyper Suprime-Cam Survey and the CFHT Large Area U-band Deep Survey (CLAUDS)2109.10138v1 · Ikuru Iwata, Marcin Sawicki, Akio K. Inoue et al.2021 · 14 citationsarXiv
SILVERRUSH. XI. Intensity Mapping for Lya Emission Extending over 100−1000100-1000 comoving kpc around z∼2−7z\sim2-7 LAEs with Subaru HSC-SSP and CHORUS Data2108.09288v1 · Shotaro Kikuchihara, Yuichi Harikane, Masami Ouchi et al.2021 · 16 citationsarXiv
GOLDRUSH. IV. Luminosity Functions and Clustering Revealed with ~4,000,000 Galaxies at z~2-7: Galaxy-AGN Transition, Star Formation Efficiency, and Implication for Evolution at z>102108.01090v3 · Yuichi Harikane, Yoshiaki Ono, Masami Ouchi et al.2021 · 202 citationsarXiv
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XIV. A Candidate Type-II Quasar at z=6.12922106.13807v1 · Masafusa Onoue, Yoshiki Matsuoka, Nobunari Kashikawa et al.2021 · 20 citationsarXiv
Interrelation of the environment of Lyα\alpha emitters and massive galaxies at 2<z<4.52<z<4.52105.01670v1 · Kei Ito, Nobunari Kashikawa, Masayuki Tanaka et al.2021 · 15 citationsarXiv
Catch Me if You Can: Biased Distribution of Lyα\alpha-emitting Galaxies according to the Viewing Direction2104.10580v1 · Rieko Momose, Kazuhiro Shimasaku, Kentaro Nagamine et al.2021 · 16 citationsarXiv
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XIII. Large-scale Feedback and Star Formation in a Low-Luminosity Quasar at z = 7.07 on the Local Black Hole to Host Mass Relation2104.05738v2 · Takuma Izumi, Yoshiki Matsuoka, Seiji Fujimoto et al.2021 · 85 citationsarXiv
Career total: at least 375 works. 197 are in this corpus.Showing the 50 most recent.

Profile built from the corpus for this byline.

Author records are still filling in while the Hub is in alpha. If this is your page, you'll be able to claim it soon. Spot a mistake? Tell us.