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Katsuji Koyama

Katsuji Koyama

D-Index & Metrics

Physics

D-Index
87
Citations
29205
World Ranking
2459
National Ranking
69

Overview

Katsuji Koyama is affiliated with Kyoto University in Japan and primarily works within the field of Physics and Astronomy. Their research encompasses a wide range of topics related to cosmology, gravitation, and astrophysics.

The scientist's work focuses on several main topics including:

  • Cosmology and Gravitation Theories
  • Galaxies: Formation, Evolution, Phenomena
  • Astrophysics and Cosmic Phenomena
  • Particle physics theoretical and experimental studies
  • Geophysics and Gravity Measurements
  • Astronomy and Astrophysical Research
  • Black Holes and Theoretical Physics

Koyama's subfields of study highlight their expertise in:

  • Astronomy and Astrophysics
  • Nuclear and High Energy Physics
  • Oceanography
  • Instrumentation
  • Artificial Intelligence

They have published extensively across several scholarly platforms, with frequent contributions to:

  • arXiv (Cornell University)
  • Zenodo (CERN European Organization for Nuclear Research)
  • Journal of Cosmology and Astroparticle Physics
  • Monthly Notices of the Royal Astronomical Society
  • Physical Review D

Their notable recent papers include:

  • "Cosmology with the Laser Interferometer Space Antenna" (2023), published in Living Reviews in Relativity
  • "Early modified gravity in light of the H0 tension and LSS data" (2021), published in Physical Review D
  • "Unified framework for early dark energy from α-attractors" (2020), published in Physical Review D
  • "Larger value for H0 by an evolving gravitational constant" (2020), published in Physical Review D
  • "Novel Probes Project: Tests of gravity on astrophysical scales" (2021), published in Reviews of Modern Physics

The scientist collaborates regularly with several co-authors, among the most frequent being:

  • C. Carbone
  • Hans A. Winther
  • Benjamin Bose
  • C. Giocoli
  • Baojiu Li

In addition to journal articles, Koyama has contributed to book publications, including a title published by the European Organization for Nuclear Research:

  • Book of Abstracts: 12th International Conference on Predictive Modelling in Food (ICPMF12), 2023

Best Publications

  • Energy spectra of low-mass binary X-ray sources observed from TENMA

    K. Mitsuda;H. Inoue;K. Koyama;K. Makishima

  • Evidence for shock acceleration of high-energy electrons in the supernova remnant SN1006

    K. Koyama;R. Petre;E. V. Gotthelf;E. V. Gotthelf;U. Hwang

  • The X-Ray Observatory Suzaku

    Kazuhisa Mitsuda;Mark Bautz;Hajime Inoue;Richard L. Kelley

  • X-Ray Imaging Spectrometer (XIS) on Board Suzaku

    Katsuji Koyama;Hiroshi Tsunemi;Tadayasu Dotani;Mark W. Bautz

  • ASCA View of Our Galactic Center: Remains of Past Activities in X-Rays?

    Katsuji Koyama;Yoshitomo Maeda;Takashi Sonobe;Toshiaki Takeshima

  • The quiescent intracluster medium in the core of the Perseus cluster

    Felix Aharonian;Felix Aharonian;Hiroki Akamatsu;Fumie Akimoto;Steven W. Allen

  • Fine Structures of Shock of SN 1006 with the Chandra Observation

    Aya Bamba;Ryo Yamazaki;Masaru Ueno;Katsuji Koyama

  • Small-Scale Structure of the SN 1006 Shock with Chandra Observations

    Aya Bamba;Ryo Yamazaki;Masaru Ueno;Katsuji Koyama

  • Discovery of Non-Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN 1006?

    Katsuji Koyama;Kenzo Kinugasa;Keiichi Matsuzaki;Mamiko Nishiuchi

  • Discovery of Non Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN1006 ?

    Katsuji Koyama;Kenzo Kinugasa;Keiichi Matsuzaki;Mamiko Nishiuchi

  • Faint X-Ray Sources Resolved in the ASCA Galactic Plane Survey and Their Contribution to the Galactic Ridge X-Ray Emission

    Mutsumi Sugizaki;Mutsumi Sugizaki;Kazuhisa Mitsuda;Hidehiro Kaneda;Keiichi Matsuzaki

  • Discovery of a Luminous, Variable, Off-Center Source in the Nucleus of M82 with the Chandra HRC

    H. Matsumoto;T. G. Tsuru;K. Koyama;H. Awaki

  • The ASTRO-H mission

    Tadayuki Takahashi;Kazuhisa Mitsuda;Richard Kelley;Felix Aharonian

  • Chandra Observation of the ρ Ophiuchi Cloud

    Kensuke Imanishi;Katsuji Koyama;Yohko Tsuboi

  • Frontiers of X-ray astronomy

    Yasuo Tanaka;Katsuji Koyama

  • A Spatial and Spectral Study of Nonthermal Filaments in Historical Supernova Remnants: Observational Results with Chandra

    Aya Bamba;Ryo Yamazaki;Tatsuo Yoshida;Toshio Terasawa

  • Discovery of an unusual hard X-ray source in the region of supernova 1987A

    T. Dotani;K. Hayashida;H. Inoue;M. Itoh

  • ASCA X-Ray Spectroscopy of Large Magellanic Cloud Supernova Remnants and the Metal Abundances of the Large Magellanic Cloud

    John P. Hughes;Ichizo Hayashi;Katsuji Koyama

  • Intense 6.7-KeV iron line emission from the galactic centre

    K. Koyama;H. Awaki;H. Kunieda;S. Takano

  • ASCA X-Ray Spectroscopy of LMC Supernova Remnants and the Metal Abundances of the LMC

    John P. Hughes;Ichizo Hayashi;Katsuji Koyama

Frequent Co-Authors

John P. Hughes
John P. Hughes Rutgers, The State University of New Jersey
Tadayuki Takahashi
Tadayuki Takahashi Kavli Institute for the Physics and Mathematics of the Universe
Norbert Werner
Norbert Werner Masaryk University
Kazuo Makishima
Kazuo Makishima University of Tokyo
Jelle Kaastra
Jelle Kaastra Leiden University
Takaya Ohashi
Takaya Ohashi Tokyo Metropolitan University
Yasushi Fukazawa
Yasushi Fukazawa Hiroshima University
Kazuhiro Nakazawa
Kazuhiro Nakazawa Nagoya University
Felix Aharonian
Felix Aharonian Dublin Institute For Advanced Studies
Roger Blandford
Roger Blandford Stanford University

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