Naoki Tsukamoto(塚本直樹)

Naoki Tsukamoto(塚本直樹)

Rikkyo University

H-index: 21

Asia-Japan

About Naoki Tsukamoto(塚本直樹)

Naoki Tsukamoto(塚本直樹), With an exceptional h-index of 21 and a recent h-index of 19 (since 2020), a distinguished researcher at Rikkyo University, specializes in the field of General Relativity, Gravity, Gravitation, Relativity, Black holes.

His recent articles reflect a diverse array of research interests and contributions to the field:

Constraints on the black-hole charges of M87* and Sagittarius A* by lensing rings

Relation between circular photon orbits and the stability of wormholes with the thin shell of a barotropic fluid

Theorem on the photon sphere of a general asymptotically-flat, static, and spherical symmetrical wormhole with Z-2 symmetry

Comment on ‘Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A*’

Gravitational lensing by using the 0th order of affine perturbation series of the deflection angle of a ray near a photon sphere

Retrolensing by two photon spheres of a black-bounce spacetime

Gravitational lensing by a Bronnikov-Kim wormhole under a weak-field approximation and in a strong deflection limit

Retrolensing by light rays slightly inside and outside of a photon sphere around a Reissner-Nordström naked singularity

Naoki Tsukamoto(塚本直樹) Information

University

Position

___

Citations(all)

1553

Citations(since 2020)

1157

Cited By

786

hIndex(all)

21

hIndex(since 2020)

19

i10Index(all)

28

i10Index(since 2020)

27

Email

University Profile Page

Rikkyo University

Google Scholar

View Google Scholar Profile

Naoki Tsukamoto(塚本直樹) Skills & Research Interests

General Relativity

Gravity

Gravitation

Relativity

Black holes

Top articles of Naoki Tsukamoto(塚本直樹)

Title

Journal

Author(s)

Publication Date

Constraints on the black-hole charges of M87* and Sagittarius A* by lensing rings

arXiv preprint arXiv:2404.06414

Naoki Tsukamoto

Ryotaro Kase

2024/4/9

Relation between circular photon orbits and the stability of wormholes with the thin shell of a barotropic fluid

Physical Review D

Naoki Tsukamoto

Takafumi Kokubu

2024/1/29

Theorem on the photon sphere of a general asymptotically-flat, static, and spherical symmetrical wormhole with Z-2 symmetry

arXiv preprint arXiv:2401.07846

Naoki Tsukamoto

2024/1/15

Comment on ‘Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A*’

Classical and Quantum Gravity

Naoki Tsukamoto

2023/10/18

Gravitational lensing by using the 0th order of affine perturbation series of the deflection angle of a ray near a photon sphere

The European Physical Journal C

Naoki Tsukamoto

2023/4/11

Retrolensing by two photon spheres of a black-bounce spacetime

Physical Review D

Naoki Tsukamoto

2022/4/20

Gravitational lensing by a Bronnikov-Kim wormhole under a weak-field approximation and in a strong deflection limit

Physical Review D

Naoki Tsukamoto

2022/3/7

Retrolensing by light rays slightly inside and outside of a photon sphere around a Reissner-Nordström naked singularity

Physical Review D

Naoki Tsukamoto

2022/1/4

Erratum: Nonlogarithmic divergence of a deflection angle by a marginally unstable photon sphere of the Damour-Solodukhin wormhole in a strong deflection limit [Phys. Rev. D 101 …

Physical Review D

Naoki Tsukamoto

2022/8/31

Affine perturbation series of the deflection angle of a ray near the photon sphere of a Reissner-Nordstr\"{o} m black hole

Physical Review D

Naoki Tsukamoto

2022/8/22

Is there a trade-off relation between efficiency and power in a collisional Penrose process in an extreme Reissner-Nordstr\"{o} m spacetime?

Physical Review D

Naoki Tsukamoto

2022/5/5

Gravitational lensing in the Simpson-Visser black-bounce spacetime in a strong deflection limit

Physical Review D

Naoki Tsukamoto

2021/1/19

Gravitational lensing by a photon sphere in a Reissner-Nordstr\"{o} m naked singularity spacetime in strong deflection limits

arXiv preprint arXiv:2107.07146, 2021

Naoki Tsukamoto

2021/7/15

Gravitational lensing by two photon spheres in a black-bounce spacetime in strong deflection limits

Physical Review D

Naoki Tsukamoto

2021/5/29

Linearization stability of reflection-asymmetric thin-shell wormholes with double shadows

Physical Review D

Naoki Tsukamoto

2021/3/19

Deflection angle of a light ray reflected by a general marginally unstable photon sphere in a strong deflection limit

Physical Review D

Naoki Tsukamoto

2020/11/10

Nonlogarithmic divergence of a deflection angle by a marginally unstable photon sphere of the Damour-Solodukhin wormhole in a strong deflection limit

Physical Review D

Naoki Tsukamoto

2020/5/11

High energy particle collisions in static, spherically symmetric black-hole-like wormholes

Physical Review D

Naoki Tsukamoto

Takafumi Kokubu

2020/2/14

See List of Professors in Naoki Tsukamoto(塚本直樹) University(Rikkyo University)

Co-Authors

H-index: 44
Tomohiro Harada

Tomohiro Harada

Rikkyo University

H-index: 26
Yoo Chul-Moon

Yoo Chul-Moon

Nagoya University

H-index: 25
Daniele Malafarina

Daniele Malafarina

Nazarbayev University

H-index: 25
Masashi Kimura

Masashi Kimura

Rikkyo University

H-index: 6
Masoumeh Ghasemi-Nodehi

Masoumeh Ghasemi-Nodehi

Institute for Research in Fundamental Sciences

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