497 citations · 935 across the 23 of their papers we have counts for
23 papers
Relativistic jet acceleration region in a black hole magnetosphere
Masaaki Takahashi, Motoki Kino, Hung-Yi Pu
We discuss stationary and axisymmetric trans-magnetosonic outflows in the magnetosphere of a rotating black hole (BH). Ejected plasma from the plasma source located near the BH is…
One-dimensional force-free numerical simulations of Alfven waves around a spinning black string
Shinji Koide, Sousuke Noda, Masaaki Takahashi +1
We performed one-dimensional force-free magnetodynamic numerical simulations of the propagation of Alfven waves along magnetic field lines around a spinning black-hole-like object,…
Constraints on the dark mass distribution surrounding Sgr A*: simple analysis for the redshift of photons from orbiting stars
Yohsuke Takamori, Shogo Nishiyama, Takayuki Ohgami +3
Sagittarius A* (Sgr A*) is the central supermassive black hole with the mass in the Milky Way and stars are orbiting around it. In May 2018, one of th…
Properties of Trans-fast Magnetosonic Jets in Black Hole Magnetospheres
Hung-Yi Pu, Masaaki Takahashi
Traveling across several order of magnitude in distance, relativistic jets from strong gravity region to asymptotic flat spacetime region are believed to consist of several general…
Blandford-Znajek process as Alfvénic superradiance
Sousuke Noda, Yasusada Nambu, Takuma Tsukamoto +1
The superradiant scattering of Alfvén waves (Alfvénic superradiance) in a forcefree magnetosphere is discussed to reveal the relationship between the Blandford-Znajek (BZ) process…
Relativistic redshift of the star S0-2 orbiting the Galactic center supermassive black hole
Tuan Do, Aurelien Hees, Andrea Ghez +26
General Relativity predicts that a star passing close to a supermassive black hole should exhibit a relativistic redshift. We test this using observations of the Galactic center st…