Concepedia
Statistics
Publications
10
Citations
413
H-Index
Active since
2015
Affiliations
Rikkyo University(Current)
Nagoya University
The University of Tokyo
High Energy Accelerator Research Organization
Yasutaka Koga is an author at Rikkyo University specializing in natural sciences, physics, and astrophysics.
Publications per year
2015–2023
Cosmological long-wavelength solutions and primordial black hole formation
Tomohiro Harada, Chul‐Moon Yoo, Tomohiro Nakama et al. · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology · 2015 · 196 citations · Full text
Natural Sciences, Physics, Astrophysics +15
Stability of null orbits on photon spheres and photon surfaces
Yasutaka Koga, Tomohiro Harada · Physical review. D/Physical review. D. · 2019 · 33 citations · Full text
Natural Sciences, Astronomy, Physics +17
Dynamical photon sphere and time evolving shadow around black holes with temporal accretion
Yasutaka Koga, Nobuyuki Asaka, Masashi Kimura et al. · Physical review. D/Physical review. D. · 2022 · 31 citations · Full text
Photon surfaces as pure tension shells: Uniqueness of thin shell wormholes
Yasutaka Koga · Physical review. D/Physical review. D. · 2020 · 29 citations · Full text
Natural Sciences, Physics, Cosmology +14
Photon surfaces in less symmetric spacetimes
Yasutaka Koga, Takahisa Igata, Keisuke Nakashi · Physical review. D/Physical review. D. · 2021 · 27 citations · Full text
Natural Sciences, Physics, Gravitation +16
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