251 citations · 2.2k across the 40 of their papers we have counts for
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High energy collision of two particles in wormhole spacetimes
Naoki Tsukamoto, Cosimo Bambi
We study the collision of two particles in the Teo wormhole spacetime, in which the wormhole is stationary and axisymmetric. We show that a non-rotating Teo wormhole cannot be a pa…
Note on the effect of a massive accretion disk in the measurements of black hole spins
Cosimo Bambi, Daniele Malafarina, Naoki Tsukamoto
The spin measurement of black holes has important implications in physics and astrophysics. Regardless of the specific technique to estimate the black hole spin, all the current ap…
Constraining the spin and the deformation parameters from the black hole shadow
Naoki Tsukamoto, Zilong Li, Cosimo Bambi
Within 5-10 years, very-long baseline interferometry (VLBI) facilities will be able to directly image the accretion flow around SgrA, the super-massive black hole candidate at…
Gravitational lensing in Tangherlini spacetime in the weak gravitational field and the strong gravitational field
Naoki Tsukamoto, Takao Kitamura, Koki Nakajima +1
The gravitational lensing effects in the weak gravitational field by exotic lenses have been investigated intensively to find nonluminous exotic objects. Gravitational lensing base…