Search Results - "Zhang, Yechi"

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 Motor CM Impedance Based Transformerless Active EMI Filter for DC-Side Common-Mode EMI Suppression in Motor Drive System by Zhang, Yechi, Li, Qiao, Jiang, Dong

“…Due to the continuous switching action of the inverter in the motor drive system, an electromagnetic interference (EMI) is generated in the system. Active EMI…”
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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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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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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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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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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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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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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? by Yanagisawa, Hiroto, Ouchi, Masami, Watanabe, Kuria, Matsumoto, Akinori, Nakajima, Kimihiko, Yajima, Hidenobu, Nagamine, Kentaro, Takahashi, Koh, Nakane, Minami, Tominaga, Nozomu, Umeda, Hiroya, Fukushima, Hajime, Harikane, Yuichi, Isobe, Yuki, Ono, Yoshiaki, Xu, Yi, Zhang, Yechi

“…Abstract We present He i /H β flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios,…”
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Research and Application of a Novel Combined Model Based on Multiobjective Optimization for Multistep-Ahead Electric Load Forecasting by Zhang, Yechi, Wang, Jianzhou, Lu, Haiyan

“…Accurate forecasting of electric loads has a great impact on actual power generation, power distribution, and tariff pricing. Therefore, in recent years,…”
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EMPRESS. XIV. Strong High-ionization Lines of Young Galaxies at z = 0–8: Ionizing Spectra Consistent with the Intermediate-mass Black Holes with M BH ∼ 103–106 M by Hatano, Shun, Ouchi, Masami, Umeda, Hiroya, Nakajima, Kimihiko, Kawaguchi, Toshihiro, Isobe, Yuki, Aoyama, Shohei, Watanabe, Kuria, Harikane, Yuichi, Kusakabe, Haruka, Matsumoto, Akinori, Moriya, Takashi J., Nishigaki, Moka, Ono, Yoshiaki, Onodera, Masato, Sugahara, Yuma, Suzuki, Akihiro, Xu, Yi, Zhang, Yechi

“…We present ionizing spectra estimated at 13.6–100 eV for 10 dwarf galaxies with strong high-ionization lines of He ii λ 4686 and [Ne v ] λ 3426 ([Ne iv ] λ…”
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Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data by Sun, Dongsheng, Mawatari, Ken, Ouchi, Masami, Ono, Yoshiaki, Yajima, Hidenobu, Zhang, Yechi, Abe, Makito, Bowman, William P., Cooper, Erin Mentuch, Davis, Dustin, Farrow, Daniel J., Gebhardt, Karl, Hill, Gary J., Liu, Chenxu, Schneider, Donald P.

“…Abstract We present cosmological-scale three-dimensional neutral hydrogen (H i ) tomographic maps at z = 2–3 over a total of 837 deg 2 in two blank fields that…”
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Novel frameless LINAC radiosurgery solution for uveal melanoma by Cappelli, Louis, Khan, Mehak, Vemula, Sudheshna, Hum, Christina, Liu, Haisong, Yu, Yan, Chen, Yingxuan, Zhang, Yechi, Sharif, Muhammad, Shi, Wenyin

“…Radiation treatment has replaced enucleation as an organ-preservation treatment for patients with uveal melanoma (UM). We developed a novel non-invasive,…”
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The HETDEX Survey Emission-line Exploration and Source Classification by Davis, Dustin, Gebhardt, Karl, Cooper, Erin Mentuch, Ciardullo, Robin, Fabricius, Maximilian, Farrow, Daniel J., Feldmeier, John J., Finkelstein, Steven L., Gawiser, Eric, Gronwall, Caryl, Hill, Gary J., Hopp, Ulrich, House, Lindsay R., Jeong, Donghui, Kollatschny, Wolfram, Komatsu, Eiichiro, Landriau, Martin, Liu, Chenxu, Saito, Shun, Tuttle, Sarah, Wold, Isak G. B., Zeimann, Gregory R., Zhang, Yechi

“…Abstract The Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) is an untargeted spectroscopic survey that aims to measure the expansion rate of the…”
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Photoconductive gain in solar-blind ultraviolet photodetector based on Mg0.52Zn0.48O thin film by Han, Shun, Zhang, Zhenzhong, Zhang, Jiying, Wang, Likun, Zheng, Jian, Zhao, Haifeng, Zhang, Yechi, Jiang, Mingming, Wang, Shuangpeng, Zhao, Dongxu, Shan, ChongXin, Li, Binghui, Shen, Dezhen

“…An ultraviolet photodetector was fabricated on MgZnO thin film grown by metal-organic chemical vapor deposition. The peak response of the device centers at 238…”
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An Active EMI Filter in Grounding Circuit for DC Side CM EMI Suppression in Motor Drive System by Zhang, Yechi, Jiang, Dong

“…In this article, an active electromagnetic interference (EMI) filter is designed to reduce the dc side common mode (CM) EMI in motor drive system. Different…”
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