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Masayuki Akiyama

0000-0002-2651-1701
astro-ph.GAastro-phastro-ph.COastro-ph.HEastro-ph.IMRadiopharmaceuticalsGamma CamerasTechnetium Tc 99m Aggregated AlbuminTechnetium Tc 99m Pentetate3-Iodobenzylguanidine

On Valency

published · living versions
W_ekyyp8js·v1 · currentpublished
Is Morphology All You Need? Quantifying Imprints of Past Star Formation in the Present-Day Morphologies of Galaxies
with Juan Pablo Alfonzo, Kartheik G. Iyer, Camilla Pacifici, Abdurro'uf +8
1 version

Preprints & journals

135 papers in the corpus · 1996–2026
Interplay of Compaction, Quenching, and Black Hole Growth in the Most Massive Galaxies since z∼5z\sim5: Insights from JWST and Chandra Data2608.24124v1 · Novan Saputra Haryana, Masayuki Akiyama, Abdurro'uf et al.2026 · 0 citationsarXiv
A Wide and Deep Exploration of Radio-detected Active Galactic Nuclei with Subaru HSC (WERGS). XII. Final Optical Identification of VLASS Radio Sources from the Subaru/HSC-SSP Wide Survey Over 1200 deg2^22603.27953v2 · Hisakazu Uchiyama, Kohei Ichikawa, Youwen Kong et al.2026 · 0 citationsarXiv
The Stellar Morphology & Size of X-ray-selected Active Galactic Nuclei Host Galaxies Revealed by JWST2510.13719v2 · Bovornpratch Vijarnwannaluk, Zhen-Kai Gao, Wei-Hao Wang et al.2025 · 0 citationsarXiv
A z ~ 0.4 Galaxy Reflecting the high-redshift Little Red Dots: An Extended Starburst with an Overmassive Black Hole2510.02801v2 · Xiaoyang Chen, Kohei Ichikawa, Masayuki Akiyama et al.2025 · 5 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)
Nature of High Equivalent Width Emitters in the Epoch of Reionization Revealed by JWST Medium-band Imaging2507.13456v1 · Kazuki Daikuhara, Takahiro Morishita, Tadayuki Kodama et al.2025 · 2 citationsarXiv
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)
The X-ray statistical properties of dust-obscured galaxies detected by eROSITA2504.09180v1 · Akatoki Noboriguchi, Kohei Ichikawa, Yoshiki Toba et al.2025 · 0 citationsA&A 702, A34 (2025)
XXL-HSC: Host properties of X-ray detected AGNs in XXL clusters2504.03422v2 · E. Drigga, E. Koulouridis, E. Pouliasis et al.2025 · 6 citationsA&A 697, A234 (2025)
Implication of a galaxy-scale negative feedback by one of the most powerful multi-phase outflows in a hyper-luminous infrared galaxy at the intermediate redshift2410.20842v3 · Xiaoyang Chen, Masayuki Akiyama, Kohei Ichikawa et al.2024 · 0 citationsarXiv
Ongoing and fossil large-scale outflows detected in a high-redshift radio galaxy: [C II] observations of TN J0924$-$2201 at z=5.174z=5.1742407.00977v1 · Kianhong Lee, Masayuki Akiyama, Kotaro Kohno et al.2024 · 3 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)
Katachi: Decoding the Imprints of Past Star Formation on Present Day Morphology in Galaxies with Interpretable CNNs2404.05146v1 · Juan Pablo Alfonzo, Kartheik G. Iyer, Masayuki Akiyama et al.2024 · 0 citationsarXiv
Observational Properties of AGN Obscuration During the Peak of Accretion Growth2403.06409v1 · Bovornpratch Vijarnwannaluk, Masayuki Akiyama, Malte Schramm et al.2024 · 0 citationsarXiv
AGN X-ray luminosity function and absorption function in the Early Universe (3≤z≤63\leq z \leq 6)2401.13515v1 · E. Pouliasis, A. Ruiz, I. Georgantopoulos et al.2024 · 21 citationsA&A 685, A97 (2024)
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
SHARPEST: The atmospheric turbulence profiling experiment using Shack-Hartmann sensor at the Subaru telescope2310.09564v1 · Hajime Ogane, Yoshito Ono, Yosuke Minowa et al.2023 · 5 citationsarXiv
Reconstruction of Cosmic Black Hole Growth and Mass Distribution from Quasar Luminosity Functions at z>4z>4: Implications for Faint and Low-mass Populations in JWST2306.06172v2 · Wenxiu Li, Kohei Inayoshi, Masafusa Onoue et al.2023 · 20 citationsarXiv
Quasar Luminosity Function at z = 72305.11225v1 · Yoshiki Matsuoka, Masafusa Onoue, Kazushi Iwasawa et al.2023 · 66 citationsarXiv
J1406+0102: Dust Obscured Galaxy Hiding Super Eddington Accretion System with Bright Radio Emission2303.05605v2 · Hikaru Fukuchi, Kohei Ichikawa, Masayuki Akiyama et al.2023 · 0 citationsarXiv
eROSITA Final Equatorial-Depth Survey (eFEDS): eFEDS X-ray view of WERGS Radio Galaxies selected by the Subaru/HSC and VLA/FIRST survey2302.07494v1 · Kohei Ichikawa, Takuji Yamashita, Andrea Merloni et al.2023 · 0 citationsA&A 672, A171 (2023)
The cosmic web of X-ray active galactic nuclei seen through the eROSITA Final Equatorial Depth Survey (eFEDS)2301.01388v2 · Johan Comparat, Wentao Luo, Andrea Merloni et al.2023 · 29 citationsA&A 673, A122 (2023)
H1821+643: The most X-ray and infrared luminous AGN in the Swift/BAT survey in the process of rapid stellar and supermassive black hole mass assembly2209.09255v1 · Hikaru Fukuchi, Kohei Ichikawa, Masayuki Akiyama et al.2022 · 3 citationsarXiv
The Obscured Fraction of Quasars at Cosmic Noon2209.07797v2 · Bovornpratch Vijarnwannaluk, Masayuki Akiyama, Malte Schramm et al.2022 · 18 citationsarXiv
Optical IFU Observations of GOALS Sample with KOOLS-IFU on Seimei Telescope: Initial results of 9 U/LIRGs at z<z < 0.042208.11824v1 · Yoshiki Toba, Satoshi Yamada, Kazuya Matsubayashi et al.2022 · 9 citationsarXiv
Finding of a population of active galactic nuclei showing a significant luminosity decline in the past ∼103−4\sim 10^{3-4} yrs2208.12286v1 · J. Pflugradt, K. Ichikawa, M. Akiyama et al.2022 · 9 citationsarXiv
Dissecting Nearby Galaxies with piXedfit: II. Spatially Resolved Scaling Relations Among Stars, Dust, and Gas2207.08382v1 · Abdurro'uf, Yen-Ting Lin, Hiroyuki Hirashita et al.2022 · 20 citationsarXiv
XXL-HSC: The link between AGN activity and star formation in the Early Universe (z⩾3.5z\geqslant3.5)2206.13935v1 · E. Pouliasis, G. Mountrichas, I. Georgantopoulos et al.2022 · 27 citationsA&A 667, A56 (2022)
On the Connection between Supermassive Black Hole and Galaxy Growth in the Reionization Epoch2203.10663v2 · Junyao Li, John D. Silverman, Takuma Izumi et al.2022 · 21 citationsarXiv
Multi-line assessment of narrow-line regions in z∼z \sim 3 radio galaxies2203.03390v1 · Koki Terao, Tohru Nagao, Kyoko Onishi et al.2022 · 10 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
XXL-HSC: An updated catalogue of high-redshift (z⩾3.5z\geqslant3.5) X-ray AGN in the XMM-XXL northern field. Constraints on the bright end of the soft logN-logS2111.04659v1 · E. Pouliasis, I. Georgantopoulos, A. Ruiz et al.2021 · 10 citationsA&A 658, A175 (2022)
Dissecting Nearby Galaxies with piXedfit: I. Spatially Resolved Properties of Stars, Dust, and Gas as Revealed by Panchromatic SED Fitting2110.03158v2 · Abdurro'uf, Yen-Ting Lin, Hiroyuki Hirashita et al.2021 · 28 citationsarXiv
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
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super-)Massive Black Holes in Extremely Radio-Loud Galaxies2108.02781v1 · Kohei Ichikawa, Takuji Yamashita, Yoshiki Toba et al.2021 · 17 citationsarXiv
The eROSITA Final Equatorial-Depth Survey (eFEDS): A multiwavelength view of WISE mid-infrared galaxies/active galactic nuclei2106.14527v2 · Yoshiki Toba, Teng Liu, Tanya Urrutia et al.2021 · 33 citationsA&A 661, A15 (2022)
The eROSITA Final Equatorial-Depth Survey (eFEDS): An X-ray bright, extremely luminous infrared galaxy at z = 1.872104.02462v1 · Yoshiki Toba, Marcella Brusa, Teng Liu et al.2021 · 11 citationsA&A 649, L11 (2021)
Black Hole and Galaxy Coevolution in Moderately Luminous Active Galactic Nuclei at z~1.4 in SXDF2101.11273v2 · Kenta Setoguchi, Yoshihiro Ueda, Yoshiki Toba et al.2021 · 17 citationsarXiv
Atmospheric turbulence profiling with multi-aperture scintillation of a Shack-Hartmann sensor2101.04294v1 · Hajime Ogane, Masayuki Akiyama, Shin Oya et al.2021 · 16 citationsarXiv
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). IX. Identification of Two Red Quasars at z > 5.62007.08685v2 · Nanako Kato, Yoshiki Matsuoka, Masafusa Onoue et al.2020 · 20 citationsarXiv
Tracing the co-evolution path of super massive black holes and spheroids with AKARI-selected ultra-luminous IR galaxies at intermediate redshifts1911.04095v3 · Xiao-Yang Chen, Masayuki Akiyama, Kohei Ichikawa et al.2019 · 11 citationsarXiv
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). X. Discovery of 35 Quasars and Luminous Galaxies at 5.7 ≤\le z ≤\le 7.01908.07910v1 · Yoshiki Matsuoka, Kazushi Iwasawa, Masafusa Onoue et al.2019 · 128 citationsApJ 883:183, 2019
Spatially resolved stellar mass buildup and quenching in massive disk galaxies over the last 10 Gyr revealed with spatially resolved SED fitting1902.07712v1 · Abdurro'uf, Masayuki Akiyama2019 · 1 citationarXiv
Enhancement of HI absorption associated with the z=3.1z=3.1 large-scale proto-cluster and characteristic structures with AGNs sculptured over Gpc scale in the SSA22 field1901.11242v1 · T. Hayashino, A. K. Inoue, K. Kousai et al.2019 · 9 citationsarXiv
Discovery of a strong ionized-gas outflow in an AKARI-selected Ultra-luminous Infrared Galaxy at z = 0.51901.05618v1 · Xiaoyang Chen, Masayuki Akiyama, Hirofumi Noda et al.2019 · 12 citationsarXiv
Gemini Infrared Multi-Object Spectrograph: Instrument Overview1807.03797v2 · Suresh Sivanandam, Scott Chapman, Luc Simard et al.2018 · 12 citationsarXiv
Extreme air pollution events in Hokkaido, Japan, traced back to early snowmelt and large-scale wildfires over East Eurasia: Case studies.29695733 · Yasunari, Teppei J, Kim, Kyu-Myong, da Silva, Arlindo M et al.2019 · 29 citationsScientific reports. 2018;8(1):6413
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). IV. Discovery of 41 Quasars and Luminous Galaxies at 5.7 < z < 6.91803.01861v2 · Y. Matsuoka, K. Iwasawa, M. Onoue et al.2018 · 132 citationsApJS 237 (2018) 5
Evolution of spatially resolved star formation main sequence and surface density profiles in massive disc galaxies at 0≲z≲10\lesssim z \lesssim 1: inside-out stellar mass buildup and quenching1802.03782v2 · Abdurro'uf, Masayuki Akiyama2018 · 43 citationsarXiv
Career total: 339 works. 135 are in this corpus.Showing the 50 most recent.

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