Kimihiko Nakajima at 自然科学研究機構国立天文台/National Astronomical Observatory of Japan - Research Interests, Publications & Academic Profile

Kimihiko Nakajima

特任助教/Project Assistant Professor

自然科学研究機構国立天文台/National Astronomical Observatory of Japan

Japan

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Research Interests

Astrophysics

100%

Astronomy

100%

Multiwavelength Astronomy

100%

Galactic Astronomy

90%

Agn Studies

80%

Galaxy Studies

80%

Star Formation

70%

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Articles20

Census for the rest-frame optical and UV morphologies of galaxies at <i>z</i> = 4–10: First phase of inside-out galaxy formation

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2024

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

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2024

Statistics for Galaxy Outflows at z ∼ 6–9 with Imaging and Spectroscopic Signatures Identified with JWST/NIRCam and NIRSpec Data

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2024

Toward Unveiling Cosmic Reionization: The Ionizing Photon Production Efficiency (ξ ion) of Low-mass Hα Emitters at z ∼ 2.3

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2024

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 ⊙

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2024

Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History

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2024

JWST and ALMA Multiple-line Study in and around a Galaxy at z = 8.496: Optical to Far-Infrared Line Ratios and the Onset of an Outflow Promoting Ionizing Photon Escape

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2024

Multiple Emission Lines of Hα Emitters at z ∼ 2.3 from the Broad- and Medium-band Photometry in the ZFOURGE Survey

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2024

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

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2024

EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely Metal-poor Galaxies

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2024

On the observability and identification of Population III galaxies with JWST

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2023

EMPRESS. IX. Extremely Metal-poor Galaxies are Very Gas-rich Dispersion-dominated Systems: Will the James Webb Space Telescope Witness Gaseous Turbulent High-z Primordial Galaxies?

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2023

EMPRESS. XI. SDSS and JWST Search for Local and z ∼4–5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

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2023

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

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2023

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

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2023

EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension

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2022

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

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2022

Diagnostics for PopIII galaxies and direct collapse black holes in the early universe

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2022

EMPRESS. VII. Ionizing Spectrum Shapes of Extremely Metal-poor Galaxies: Uncovering the Origins of Strong He ii and the Impact on Cosmic Reionization

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2022

EMPRESS. VI. Outflows Investigated in Low-mass Galaxies with M ∗ = 104–107 M ⊙: Weak Feedback in Low-mass Galaxies?

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Year:

2022

Collaborators15

Shinobu Ozaki

講師/Associate Professor (Senior Lecturer equivalent)

自然科学研究機構国立天文台/National Astronomical Observatory of Japan

JAPAN

Tsutomu Takeuchi

Associate Professor

Nagoya University

JAPAN

Yutaka Komiyama

助教/Assistant Professor

自然科学研究機構国立天文台/National Astronomical Observatory of Japan

JAPAN

Ken’ichi Nomoto

JAPAN

Nozomu Tominaga

Professor

National Astronomical Observatory of Japan

JAPAN

Tom Harvey

The University of Manchester

UNITED KINGDOM

Nathan Adams

The University of Manchester

UNITED KINGDOM

John Wise

Professor

Georgia Institute of Technology

UNITED STATES

Koh Takahashi

助教/Assistant Professor

自然科学研究機構国立天文台/National Astronomical Observatory of Japan

JAPAN

Kohei Hayashi

Lecturer

National Institute of Technology, Tokyo College

JAPAN

Akihiro Suzuki

特任助教/Project Assistant Professor

自然科学研究機構国立天文台/National Astronomical Observatory of Japan

JAPAN

Kentaro Motohara

教授/Professor

自然科学研究機構国立天文台/National Astronomical Observatory of Japan

JAPAN

Yechi Zhang

University of Tokyo

JAPAN

Kentaro Nagamine

Professor

Osaka University

JAPAN

Seiji Fujimoto

Københavns Universitet

DENMARK

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