Ataru Tanikawa



Affiliation Center for Information Science
Title Associate professor
Room Library Bldg 202 (Extension1261)
E-mail ( at = @ )
Education D. C. University of Tokyo
Degree Doctor of Philosophy
Academic Societies Astronomical Society of Japan, Rironkon (organization of theoretical astrophysicists in Japan)
Career Nov. 2008 - Mar. 2009, JSPS Postdoctoral Fellow
Apr. 2009 - Sep. 2012, Research Fellow at University of Tsukuba
Oct. 2012 - Mar. 2013, Research Fellow at University of Aizu
Apr. 2013 - Aug. 2015, Research Fellow at RIKEN AICS
Sep. 2015 - Dec. 2023, Assistant professor at University of Tokyo
Jan. 2024 - Present, Associate professor at Fukui Prefectural University

Research Interest

Research Field Astrophysics, Data science, Numerical simulation
Research Summary There are a large number of black holes, which swallow the light, in the universe. Because they swallow the light, they are basically dark and invisible. However, two black holes rarely merge and emit "gravitational waves", which are space-time distortion. We can discover such black holes through gravitational wave observations. Furthermore, a part of black holes accompany fixed stars, which shine by themselves like the Sun. We can also indirectly discover black holes via observations of such fixed stars. I have theoretically studied how such detectable black holes are formed. Very recently, I try to discover such black holes actively.
Keywords Black holes, White dwarfs, Globular clusters, Type Ia supernovae, Gravitational waves, Astrometry

Selected Publications

【Publications in refereed journals (lead author)】
1. "Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data" Tanikawa A., Hattori K., Kawanaka N., Kinugawa T., Shikauchi M., Tsuna D. 2023, ApJ, 946, 79 (arXiv:2209.05632)
2. "Merger rate density of Population III binary black holes below, above, and in the pair-instability mass gap" Tanikawa A., Susa H., Yoshida T., Trani A. A., Kinugawa T. 2021, ApJ, 910, 30 (arXiv:2008.01890)
3. "Hydrodynamical Evolution of Merging Carbon-oxygen White Dwarfs: Their Pre-supernova Structure and Observational Counterparts" Tanikawa A., Nakasato N., Sato Y., Nomoto K., Maeda K., Hachisu I. 2015, ApJ, 807, 40 (arXiv:1504.06035)
4. "Dynamical evolution of stellar-mass black holes in dense stellar clusters: estimate for merger rate of binary black holes originating from globular clusters" Tanikawa A. 2013, MNRAS, 435, 1358 (arXiv:1307.6268)

and 24 other papers

【Publications in refereed journals (coauthor)】
1. "Gravitational-Wave Emission from Binary Black Holes Formed in Open Clusters" Kumamoto J., Fujii M. S., Tanikawa A. 2019, MNRAS, 486, 3942 (arXiv:1811.06726)
2. "Implementation and performance of FDPS: A Framework Developing Parallel Particle Simulation Codes" Iwasawa M., Tanikawa A., Hosono N., Nitadori K., Muranushi T., Makino J. 2016, PASJ, 68, 54 (arXiv:1601.03138)
3. "A Systematic Study of Carbon-Oxygen White Dwarf Mergers: Mass Combinations for Type Ia Supernovae" Sato Y., Nakasato N., Tanikawa A., Nomoto K., Maeda K., Hachisu I. 2015, ApJ, 807, 105 (arXiv:1505.01646)

and other 24 papers

【Publications in proceedings (selected)】
1. "High Performance Gravitational N-body Simulations on Supercomputer Fugaku" Ishiyama T., Yoshikawa K., Tanikawa A. 2022, International Conference on High Performance Computing in Asia-Pacific Region, Online
2. "FDPS: a novel framework for developing high-performance particle simulation codes for distributed-memory systems" Iwasawa M., Tanikawa A., Hosono N., Nitadori K., Muranushi T., Makino J. 2015, WOLFHPC’15 Proceedings of the 5th International Workshop on Domain-Specific Languages and High-Level Frameworks for High Performance Computing, 1

Community Engagement

・SOC of Rironkon (Dec. 2022 - Nov. 2024)
・Lecture in Minato Science Museum (Mar. 26, 2022)
・Lecture in Asahi Culture Center, Shinjuku (May 14, 2016)

Educational Activities

Classes Elementary Physics, Basic Data Processing, Basic Mathematics
Office Hour At any time, but reservation required in advance by email.
Available Topics Astrophysics, Data Science, Numerical Simulation

Additional Information