151 citations · 613 across the 21 of their papers we have counts for
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Constraints on the Evolution of Black Hole Spin due to Magnetohydrodynamic Accretion
Masaaki Takahashi, Akira Tomimatsu
Stationary and axisymmetric ideal magnetohydrodynamic (MHD) accretion onto a black hole is studied analytically. The accreting plasma ejected from a plasma source with low velocity…
Relativistic Acceleration of Magnetically Driven Jets
Akira Tomimatsu, Masaaki Takahashi
We present an analytical model for describing highly relativistic acceleration of magnetically driven jets, within the framework of ideal MHD for cold, stationary and axisymmetric…
Screw instability in black hole magnetospheres and a stabilizing effect of field-line rotation
Akira Tomimatsu, Tomoya Matsuoka, Masaaki Takahashi
The screw instability of magnetic field is a mechanism for prohibiting a generation of strongly twisted field lines in large scales. If it can work in black hole magnetospheres, th…
Black Hole Magnetospheres Around Thin Disks Driving Inward and Outward Winds
Akira Tomimatsu, Masaaki Takahashi
We construct a simple model for stationary, axisymmetric black-hole magnetospheres, in which the poloidal magnetic field is generated by a toroidal electric current in a thin disk…
Relativistic Dynamos in Magnetospheres of Rotating Compact Objects
Akira Tomimatsu
The kinematic evolution of axisymmetric magnetic fields in rotating magnetospheres of relativistic compact objects is analytically studied, based on relativistic Ohm's law in stati…