Takahisa Igata, Tomohiro Harada, Hiromi Saida, Yohsuke Takamori. Periapsis shifts in dark matter distribution around a black hole. International Journal of Modern Physics D. 2023. 32. 16. 2350105
Tomohiro Harada, Takahisa Igata, Hiromi Saida, Yohsuke Takamori. General formulae for the periapsis shift of a quasi-circular orbit in static spherically symmetric spacetimes and the active gravitational mass density. International Journal of Modern Physics D. 2023. 32. 15. 2350098
Tomohiro Harada, Takahisa Igata, Sato, Takuma, Carr, Bernard. Complete classification of Friedmann-Lemaître-Robertson-Walker solutions with linear equation of state: parallelly propagated curvature singularities for general geodesics. Classical and Quantum Gravity. 2022. 39. 14. 145008
Takahisa Igata, Yohsuke Takamori. Periapsis shifts in dark matter distribution with a dense core. Physical Review D. 2022. 105. 12. 124029
Kota Ogasawara, Takahisa Igata. Photon escape in the extremal Kerr black hole spacetime. Physical Review D. 2022. 105. 2. 024031