Search Results - "Isobe, Yuki"

A Comprehensive Study of Galaxies at z ∼ 9–16 Found in the Early JWST Data: Ultraviolet Luminosity Functions and Cosmic Star Formation History at the Pre-reionization Epoch by Harikane, Yuichi, Ouchi, Masami, Oguri, Masamune, Ono, Yoshiaki, Nakajima, Kimihiko, Isobe, Yuki, Umeda, Hiroya, Mawatari, Ken, Zhang, Yechi

“…Abstract We conduct a comprehensive study on dropout galaxy candidates at z ∼ 9–16 using the first 90 arcmin 2 James Webb Space Telescope (JWST) Near Infrared…”
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A JWST/NIRSpec First Census of Broad-line AGNs at z = 4–7: Detection of 10 Faint AGNs with M BH ∼ 106–108 M ⊙ and Their Host Galaxy Properties by Harikane, Yuichi, Zhang, Yechi, Nakajima, Kimihiko, Ouchi, Masami, Isobe, Yuki, Ono, Yoshiaki, Hatano, Shun, Xu, Yi, Umeda, Hiroya

“…We present the first statistical sample of faint type 1 AGNs at z > 4 identified by JWST/NIRSpec deep spectroscopy. Among the 185 galaxies at z _spec = 3.8–8.9…”
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JWST Census for the Mass–Metallicity Star Formation Relations at z = 4–10 with Self-consistent Flux Calibration and Proper Metallicity Calibrators by Nakajima, Kimihiko, Ouchi, Masami, Isobe, Yuki, Harikane, Yuichi, Zhang, Yechi, Ono, Yoshiaki, Umeda, Hiroya, Oguri, Masamune

“…Abstract We present the evolution of the mass–metallicity (MZ) relation at z = 4–10 derived with 135 galaxies identified in JWST/NIRSpec data taken from the…”
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Hydrogen Peroxide Production on a Carbon Nitride–Boron Nitride‐Reduced Graphene Oxide Hybrid Photocatalyst under Visible Light by Kofuji, Yusuke, Isobe, Yuki, Shiraishi, Yasuhiro, Sakamoto, Hirokatsu, Ichikawa, Satoshi, Tanaka, Shunsuke, Hirai, Takayuki

“…Photocatalytic production of hydrogen peroxide (H2O2) from earth‐abundant water and O2 is a desirable artificial photosynthesis for solar fuel production. A…”
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Morphologies of Galaxies at z ≳ 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z ∼ 12 by Ono, Yoshiaki, Harikane, Yuichi, Ouchi, Masami, Yajima, Hidenobu, Abe, Makito, Isobe, Yuki, Shibuya, Takatoshi, Wise, John H., Zhang, Yechi, Nakajima, Kimihiko, Umeda, Hiroya

“…Abstract We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2–5 μ m imaging. Our sample consists of 22 galaxy candidates identified by…”
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EMPRESS. VII. Ionizing Spectrum Shapes of Extremely Metal-poor Galaxies: Uncovering the Origins of Strong He ii and the Impact on Cosmic Reionization by Umeda, Hiroya, Ouchi, Masami, Nakajima, Kimihiko, Isobe, Yuki, Aoyama, Shohei, Harikane, Yuichi, Ono, Yoshiaki, Matsumoto, Akinori

“…Abstract Strong high-ionization lines such as He ii of young galaxies are puzzling at high and low redshift. Although recent studies suggest the existence of…”
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Redshift Evolution of Electron Density in the Interstellar Medium at z ∼ 0–9 Uncovered with JWST/NIRSpec Spectra and Line-spread Function Determinations by Isobe, Yuki, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Ono, Yoshiaki, Xu, Yi, Zhang, Yechi, Umeda, Hiroya

“…Abstract We present electron densities n e in the interstellar medium (ISM) of star-forming galaxies at z = 4–9 observed by the JWST/NIRSpec GLASS, Early…”
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Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History by Nakane, Minami, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Ono, Yoshiaki, Umeda, Hiroya, Isobe, Yuki, Zhang, Yechi, Xu, Yi

“…Abstract We present the evolution of Ly α emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy…”
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EMPRESS. V. Metallicity Diagnostics of Galaxies over 12 + log(O/H) ≃ 6.9–8.9 Established by a Local Galaxy Census: Preparing for JWST Spectroscopy by Nakajima, Kimihiko, Ouchi, Masami, Xu, Yi, Rauch, Michael, Harikane, Yuichi, Nishigaki, Moka, Isobe, Yuki, Kusakabe, Haruka, Nagao, Tohru, Ono, Yoshiaki, Onodera, Masato, Sugahara, Yuma, Kim, Ji Hoon, Komiyama, Yutaka, Lee, Chien-Hsiu, Zahedy, Fakhri S.

“…Abstract We present optical-line gas metallicity diagnostics established by the combination of local SDSS galaxies and the largest compilation of extremely…”
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JWST Identification of Extremely Low C/N Galaxies with [N/O] ≳ 0.5 at z ∼ 6–10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation by Isobe, Yuki, Ouchi, Masami, Tominaga, Nozomu, Watanabe, Kuria, Nakajima, Kimihiko, Umeda, Hiroya, Yajima, Hidenobu, Harikane, Yuichi, Fukushima, Hajime, Xu, Yi, Ono, Yoshiaki, Zhang, Yechi

“…Abstract We present chemical abundance ratios of 70 star-forming galaxies at z ∼ 4–10 observed by the JWST/NIRSpec Early Release Observations, GLASS, and CEERS…”
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Transmission electron microscopic study on rutile-type GeO2 film on TiO2 (001) substrate by Takane, Hitoshi, Konishi, Shinya, Ota, Ryo, Hayasaka, Yuichiro, Wakamatsu, Takeru, Isobe, Yuki, Kaneko, Kentaro, Tanaka, Katsuhisa

“…Rutile-type GeO2 (r-GeO2) with an ultrawide bandgap of ∼4.7 eV has emerged as a promising material for next-generation power-electronic and optoelectronic…”
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JWST Measurements of Neutral Hydrogen Fractions and Ionized Bubble Sizes at z = 7–12 Obtained with Lyα Damping Wing Absorptions in 27 Bright Continuum Galaxies by Umeda, Hiroya, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Ono, Yoshiaki, Xu, Yi, Isobe, Yuki, Zhang, Yechi

“…Abstract We present volume-averaged neutral hydrogen fractions x H I and ionized bubble radii R b measured with Ly α damping wing absorption of galaxies at the…”
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Statistics for Galaxy Outflows at z ∼ 6–9 with Imaging and Spectroscopic Signatures Identified with JWST/NIRCam and NIRSpec Data by Zhang, Yechi, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Isobe, Yuki, Xu, Yi, Ono, Yoshiaki, Umeda, Hiroya

“…Abstract We present statistics of z ∼ 6–9 galaxy outflows indicated by spatially extended gas emission and broad lines. With a total of 61 spectroscopically…”
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Pure Spectroscopic Constraints on UV Luminosity Functions and Cosmic Star Formation History from 25 Galaxies at z spec = 8.61–13.20 Confirmed with JWST/NIRSpec by Harikane, Yuichi, Nakajima, Kimihiko, Ouchi, Masami, Umeda, Hiroya, Isobe, Yuki, Ono, Yoshiaki, Xu, Yi, Zhang, Yechi

“…Abstract We present pure spectroscopic constraints on the UV luminosity functions and cosmic star formation rate (SFR) densities from 25 galaxies at z spec =…”
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EMPRESS. XIII. Chemical Enrichment of Young Galaxies Near and Far at z ∼ 0 and 4–10: Fe/O, Ar/O, S/O, and N/O Measurements with a Comparison of Chemical Evolution Models by Watanabe, Kuria, Ouchi, Masami, Nakajima, Kimihiko, Isobe, Yuki, Tominaga, Nozomu, Suzuki, Akihiro, Ishigaki, Miho N., Nomoto, Ken’ichi, Takahashi, Koh, Harikane, Yuichi, Hatano, Shun, Kusakabe, Haruka, Moriya, Takashi J., Nishigaki, Moka, Ono, Yoshiaki, Onodera, Masato, Sugahara, Yuma

“…Abstract We present gas-phase elemental abundance ratios of thirteen local extremely metal-poor galaxies (EMPGs), including our new Keck/LRIS spectroscopy…”
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EMPRESS. III. Morphology, Stellar Population, and Dynamics of Extremely Metal-poor Galaxies (EMPGs): Are EMPGs Local Analogs of High-z Young Galaxies? by Isobe, Yuki, Ouchi, Masami, Kojima, Takashi, Shibuya, Takatoshi, Hayashi, Kohei, Rauch, Michael, Kikuchihara, Shotaro, Zhang, Haibin, Ono, Yoshiaki, Fujimoto, Seiji, Harikane, Yuichi, Kim, Ji Hoon, Komiyama, Yutaka, Kusakabe, Haruka, Lee, Chien-Hsiu, Mawatari, Ken, Onodera, Masato, Sugahara, Yuma, Yabe, Kiyoto

“…Abstract We present the morphology and stellar population of 27 extremely metal-poor galaxies (EMPGs) at z ∼ 0 with metallicities of 0.01–0.1 Z ⊙ . We conduct…”
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Carrier density control of Sb-doped rutile-type SnO2 thin films and fabrication of a vertical Schottky barrier diode by Takahashi, Yui, Takane, Hitoshi, Izumi, Hirokazu, Wakamatsu, Takeru, Isobe, Yuki, Kaneko, Kentaro, Tanaka, Katsuhisa

“…We report on the control of carrier density in r-SnO _2 thin films grown on isostructural r-TiO _2 substrates by doping with Sb aiming for power-electronics…”
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Low [O/Fe] Ratio in a Luminous Galaxy at the Early Cosmic Epoch (z > 10): Signature of Short Delay Time or Bright Hypernovae/Pair-instability Supernovae? by Nakane, Minami, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Tominaga, Nozomu, Takahashi, Koh, Kashino, Daichi, Yanagisawa, Hiroto, Watanabe, Kuria, Nomoto, Ken’ichi, Isobe, Yuki, Nishigaki, Moka, Ishigaki, Miho N., Ono, Yoshiaki, Takeda, Yui

“…Abstract We present an [O/Fe] ratio of a luminous galaxy GN-z11 at z = 10.60 derived with the deep public JWST/NIRSpec data. We fit the medium-resolution…”
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Balmer Decrement Anomalies in Galaxies at z ∼ 6 Found by JWST Observations: Density-bounded Nebulae or Excited H i Clouds? by Yanagisawa, Hiroto, Ouchi, Masami, Nakajima, Kimihiko, Yajima, Hidenobu, Umeda, Hiroya, Baba, Shunsuke, Nakagawa, Takao, Nakane, Minami, Matsumoto, Akinori, Ono, Yoshiaki, Harikane, Yuichi, Isobe, Yuki, Xu, Yi, Zhang, Yechi

“…Abstract We investigate the physical origins of the Balmer decrement anomalies in GS-NDG-9422 and RXCJ2248-ID galaxies at z ∼ 6 whose H α /H β values are…”
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Severity Indices for Obstructive Sleep Apnea Syndrome Reflecting Glycemic Control or Insulin Resistance by Isobe, Yuki, Nakatsumi, Yasuto, Sugiyama, Yu, Hamaoka, Takuto, Murai, Hisayoshi, Takamura, Masayuki, Kaneko, Shuichi, Takata, Shigeo, Takamura, Toshinari

“…Objective We aimed to identify obstructive sleep apnea syndrome (OSAS) severity indices reflecting the anthropometric and metabolic characteristics of patients…”
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