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Yuki Isobe

  1. A JWST/NIRSpec First Census of Broad-Line AGNs at z=4-7: Detection of 10 Faint AGNs with MBH~106-108 Msun and Their Host Galaxy Properties
    2023/03/21 by Yuichi Harikane, Yechi Zhang, Harikane, Yuichi +15 · 57 citations
    Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena
  2. Pure Spectroscopic Constraints on UV Luminosity Functions and Cosmic Star Formation History From 25 Galaxies at zspec=8.61-13.20 Confirmed with JWST/NIRSpec
    2023/04/13 by Yuichi Harikane, Harikane, Yuichi, Kimihiko Nakajima +13 · 17 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae
  3. 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 Universe
    2024/06/26 by Yuichi Harikane, Akio Inoue, Harikane, Yuichi +67 · 26 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies
  4. JWST Identification of Extremely Low C/N Galaxies with [N/O]\gtrsim 0.5 at z∼ 6-10 Evidencing the Early CNO-Cycle Enrichment and a Connection with Globular Cluster Formation
    2023/07/03 by Yuki Isobe, Isobe, Yuki, Masami Ouchi +21 · 6 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies
  5. A direct black-hole mass measurement in a little red dot at high redshift
    2025/08/29 by Ignas Juodžbalis, Cosimo Marconcini, Juodžbalis, Ignas +85 · 7 voices · 6 citations
    Engineering · #Particle Accelerators and Free-Electron Lasers
  6. JADES: Nitrogen Enhancement in High-Redshift Broad-Line Active Galactic Nuclei
    2025/02/17 by Yuki Isobe, R. Maiolino, Isobe, Yuki +34 · 7 citations
    Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences
  7. Connecting JWST discovered N/O-enhanced galaxies to globular clusters: Evidence from chemical imprints
    2025/05/18 by Xihan Ji, Ji, Xihan, Vasily Belokurov +15 · 1 voice · 7 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Galaxies: Formation, Evolution, Phenomena #astro-ph.GA
  8. JWST Census for the Mass-Metallicity Star-Formation Relations at z=4-10 with the Self-Consistent Flux Calibration and the Proper Metallicity Calibrators
    2023/01/30 by Kimihiko Nakajima, Masami Ouchi, Nakajima, Kimihiko +13 · 3 citations
    Physics and Astronomy · #Galaxies: Formation, Evolution, Phenomena #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies
  9. Strong He I Emission Lines in High N/O Galaxies at z ∼ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?
    2024/05/03 by Hiroto Yanagisawa, Yanagisawa, Hiroto, Masami Ouchi +31 · 3 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena
  10. Stellar- and AGN-Driven Outflows in JWST Galaxies at z=3-9: More Frequent, Wider Opening Angles, and Mostly Bounded
    2023/10/10 by Yi Xu, Xu, Yi, Masami Ouchi +13 · 2 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae
  11. Dinucleon and Nucleon Decay to Two-Body Final States with no Hadrons in Super-Kamiokande
    2018/11/29 by S. Sussman, Kamiokande Collaboration, Sussman, S. +265 · 1 citation
    Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle physics theoretical and experimental studies #Scientific Research and Discoveries
  12. BlackTHUNDER -- A non-stellar Balmer break in a black hole-dominated little red dot at z=7.04
    2025/01/22 by Xihan Ji, Ji, Xihan, R. Maiolino +71 · 4 citations
    Physics and Astronomy · Engineering · #Astrophysical Phenomena and Observations #Particle Accelerators and Free-Electron Lasers #Heat Transfer Mechanisms
  13. EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low YP Value
    2025/06/30 by Hiroto Yanagisawa, Masami Ouchi, Yanagisawa, Hiroto +39 · 9 citations
    Physics and Astronomy · #Astronomy and Astrophysical Research #Electrical and Electromagnetic Research #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #astro-ph.GA
  14. JADES and BlackTHUNDER: rest-frame Balmer-line absorption and the local environment in a Little Red Dot at z = 5
    2025/06/17 by Francesco D’Eugenio, D'Eugenio, Francesco, Ignas Juodžbalis +67 · 7 citations
    Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Photonic Crystals and Applications
  15. Census for the Rest-frame Optical and UV Morphologies of Galaxies at z=4-10: First Phase of Inside-Out Galaxy Formation
    2023/09/06 by Yoshiaki Ono, Yuichi Harikane, Ono, Yoshiaki +17 · 1 citation
    Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena
  16. Balmer Decrement Anomalies in Galaxies at z ~ 6 Found by JWST Observations: Density-Bounded Nebulae or Excited H I Clouds?
    2024/03/29 by Hiroto Yanagisawa, Masami Ouchi, Yanagisawa, Hiroto +25 · 1 citation
    Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Stellar, planetary, and galactic studies
  17. Gas-Phase Metallicity and Nitrogen Abundances in Low-Mass Galaxies Down to M_⋆≃105.7 M_\odot at z≃4.5--10.1 from JWST Lensing Cluster Surveys
    2026/07/17 by Hiroya Umeda, Masami Ouchi, Kimihiko Nakajima +7
    #astro-ph.GA
  18. The Mysterious Case of Iron in XMPs: Anomalous High log(Fe/O) Observed in Extremely Metal-Poor Galaxies HSCJ1631+4426 and SDSSJ0811+4730
    2026/07/16 by Aaron Myszka, Themiya Nanayakkara, Karl Glazebrook +8
    #astro-ph.GA