Rohta TAKAHASHI, D. Sci.

日本語

Associate Professor
Division of Applied Mathematics
Department of Natural and Physical Sciences
Tomakomai National College of Technology

Contact
Department of Natural and Physical Sciences
Tomakomai National College of Technology
Tomakomai 059-1275, Japan
TEL: +81-144-67-8096
E-mail: rohta[at]riken.jp

Degrees
2005 D.Sci. Physics & Astrophysics, Kyoto University
2002 M.A. Physics & Astrophysics, Kyoto University
2000 B.A. Science Kyoto University

Professional History
2011-present Associate Professor, Tomakomai National College of Technology
2011-present Visiting Researcher, RIKEN [concurrent post]
2008-2011 Special Postdoctral Researcher, RIKEN
2005-2008 JSPS Postdoctoral Fellow, Graduate School of Arts and Sciences, The University of Tokyo
2003-2005 JSPS Fellow (DC2), Yukawa Institute of Theoretical Physics, Kyoto University
2002-2003 Teaching Assistant, Yukawa Institute of Theoretical Physics, Kyoto University

Refereed Publications (list of SAO/NASA ADS refereed articles)

• "Spacetime rotation-induced Landau quantization", K. Konno and R. Takahashi, Physical Review D, 85, 061502(R) (2012)
• "Oscillation Phenomena in the Disk around the Massive Black Hole Sagittarius A*", M. Miyoshi, Z.-Q. Shen, T. Oyama, R. Takahashi, and Y. Kato, Publications of the Astronomical Society of Japan, 63, 1093 (2011)
• "Constraining the Size of the Dark Region Around the M87 Black Hole by Space-VLBI Observations", R. Takahashi, S. Mineshige, The Astrophysical Journal, 729, 86 (2011)
• "Outflows from accreting super-spinars", C. Bambi, T. Harada, R. Takahashi, N. Yoshida, Physical Review D, 81, 104004 (2010)
• "Black Hole Aurora Powered by a Rotating Black Hole", M. Takahashi, R. Takahashi, The Astrophysical Journal Letters, 714, L176 (2010)
• "Observational testability of a Kerr bound in the x-ray spectrum of black hole candidates", R. Takahashi, T. Harada, Classical and Quantum Gravity, 27, 075003 (2010)
• "Anisotropic radiation field and trapped photons around the Kerr black hole", R. Takahashi, M. Takahashi, Astronomy and Astrophysics, 513, A77(2010)
• "Measuring spin of a supermassive black hole at the Galactic centre - implications for a unique spin", Y. Kato, M. Miyoshi, R. Takahashi, H. Negoro, R. Matsumoto, Monthly Notices of the Royal Astronomical Society: Letters, 403, L74 (2010)
• "Direct Time Radio Variability Induced by Non-Axisymmetric Standing Accretion Shock Instability: Implications for M87", H. Nagakura, R. Takahashi, The Astrophysical Journal, 711, 222 (2010)
• "Testing the Accretion Flow with Plasma Wave Heating Mechanism for Sagittarius A* by the 1.3 mm VLBI Measurements", L. Huang, R. Takahashi, Z.-Q. Shen, The Astrophysical Journal, 706, 960 (2009)
• "Accretion process onto super-spinning objects", C. Bambi, K. Freese, T. Harada, R. Takahashi, N. Yoshida, Physical Review D, 80, 104023 (2009)
• "Equilibrium states of magnetized toroid-central compact object systems", J. Otani, R. Takahashi, Y. Eriguchi, Monthly Notices of the Royal Astronomical Society, 396, 2152 (2009)
• "Radiation hydrodynamics in Kerr space-time: equations without coordinate singularity at the event horizon", R. Takahashi, Monthly Notices of the Royal Astronomical Society, 383, 1155 (2008)
• "Equations of general relativistic radiation hydrodynamics in Kerr space-time", R. Takahashi, Monthly Notices of the Royal Astronomical Society, 382, 1041 (2007)
• "Horizon-penetrating transonic accretion discs around rotating black holes", R. Takahashi, Monthly Notices of the Royal Astronomical Society, 382, 567 (2007)
• "An Approach Detecting the Event Horizon of Sgr A*", M. Miyoshi, S. Kameno, J. K. Ishitsuka, Z.-Q. Shen, R. Takahashi, S. Horiuchi, Publ. Nat. Astron. Obs. Japan, 10, 15 (2007)
• "Magnetohydrodynamics of Neutrino-Cooled Accretion Tori around a Rotating Black Hole in General Relativity", M. Shibata, Y. Sekiguchi, R. Takahashi, Progress of Theoretical Physics, 118, 257 (2007)
• "Numerical Study of Gamma-Ray Burst Jet Formation in Collapsars", S. Nagataki, R. Takahashi, A. Mizuta, T. Takiwaki, The Astrophysical Journal, 659, 512 (2007)
• "Eclipsing light curves for accretion flows around a rotating black hole and atmospheric effects of the companion star", R. Takahashi, K. Watarai, Monthly Notices of the Royal Astronomical Society, 374, 1515 (2007)
• "Advection-dominated accretion flows with causal viscosity", R. Takahashi, Astronomy and Astrophysics, 461, 393 (2007)
• "Numerical simulations of collapsars with neutrino heating and magnetic field", S. Nagataki, R. Takahashi, A. Mizuta, T. Takiwaki, Il Nuovo Cimento B, 121, 1139 (2006)
• "Eclipsing Light-Curve Asymmetry for Black-Hole Accretion Flows", K.-Y. Watarai, R. Takahashi, J. Fukue, Publications of the Astronomical Society of Japan, 57, 827 (2005)
• "Geometrical Effect of Supercritical Accretion Flows: Observational Implications of Galactic Black-Hole Candidates and Ultraluminous X-Ray Sources", K.-Y. Watarai, K. Ohsuga, R. Takahashi, J. Fukue, Publications of the Astronomical Society of Japan, 57, 513 (2005)
• "Black Hole Shadows of Charged Spinning Black Holes", R. Takahashi, Publications of the Astronomical Society of Japan, 57, 273 (2005)
• "Shapes and Positions of Black Hole Shadows in Accretion Disks and Spin Parameters of Black Holes", R. Takahashi, The Astrophysical Journal, 611, 996 (2004)
• "Astrometric Microlensing by Finite-Size Lenses", R. Takahashi, The Astrophysical Journal, 595, 418 (2003)
• "X-Ray Microlensing of Bright Quasars", R. Takahashi, A. Yonehara, S. Mineshige, Publications of the Astronomical Society of Japan, 53, 387 (2001)
• "X-Ray Microlensing of Bright Quasars", S. Mineshige, A. Yonehara, R. Takahashi, Publications of the Astronomical Society of Australia, 18, 186 (2001)

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