Chief Scientist Laboratories High Energy Astrophysics Laboratory
Chief Scientist: Toru Tamagawa (D.Sc.)
Research Summary
Immediately after the Big Bang, the beginning of our universe, only hydrogen and helium existed. However, nucleosynthesis in the supernova explosions over the course of 13.8 billion years led to the evolution of a world brimming with the many different elements we have today. By using satellites to detect X-rays and gamma-rays, we are observing the synthesized elements at their actual source. Our goal is to comprehensively elucidate the scenarios for the formation of the elements in the universe. We are also conducting observations of the extreme conditions near black holes and neutron stars that are unreachable on Earth, to see how far our knowledge of physics can be applied.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Engineering
- Particle/Nuclear/Cosmic ray/Astro physics
- Astronomy
Keywords
- Astrophysics and space science
- Payload development onboard satellites
- Radiation detection technology
Selected Publications
- 1.
Baldini, L., et al.:
"Design, construction, and test of the Gas Pixel Detectors for the IXPE mission"
Astroparticle Physics 133, 102628 (2021). - 2.
Abarr, Q., et al.:
"XL-Calibur - a second-generation balloon-borne hard X-ray polarimetry mission"
Astroparticle Physics 126, 102529 (2021). - 3.
Nakahira, S.; et al.:
"MAXI/SSC All-sky maps from 0.7 keV to 4 keV"
Publications of the Astronomical Society of Japan 72, 17 (2020). - 4.
Tamagawa, T., et al.:
"Multiplexing lobster-eye optics: a concept for wide-field x-ray monitoring"
Journal of Astronomical Telescopes, Instruments, and Systems 6, 025003 (2020). - 5.
Gu, L., et al.:
"Observations of a Pre-Merger Shock in Colliding Clusters of Galaxies"
Nature Astronomy 3, 838 (2019). - 6.
Kitaguchi, T., et al.:
"A convolutional neural network approach for reconstructing polarization information of photoelectric X-ray polarimeters"
Nuclear Inst. and Methods in Physics Research A 942, 162389 (2019). - 7.
O’dell, S., et al.:
"The Imaging X-ray Polarimetry Explorer (IXPE): technical overview"
Proceedings of the SPIE 10699, 106991X (2018). - 8.
Yatabe, F., et al.:
"An application of the Ghosh & Lamb model to the accretion-powered X-ray pulsar X Persei"
Publications of the Astronomical Society of Japan 70, 89 (2018). - 9.
The Hitomi Collaboration:
"Solar abundance ratios of the iron-peak elements in the Perseus cluster"
Nature 551, 478 (2017). - 10.
The Hitomi Collaboration:
"The quiescent intracluster medium in the core of the Perseus cluster"
Nature 535, 117 (2016).
Recent Research Results
Jul. 8, 2019
Galaxy clusters caught in a first kiss
Related Links
Lab Members
Principal investigator
- Toru Tamagawa
- Chief Scientist
Core members
- Tatehiro Mihara
- Senior Research Scientist
- Takao Kitaguchi
- Research Scientist
- Makoto Sawada
- Research Scientist
- Yuanhui Zhou
- Junior Research Associate
- Jin Li
- Junior Research Associate
- Hiroki Sato
- Student Trainee
- Kento Sakai
- Student Trainee
- Wataru Iwakiri
- Visiting Scientist
- Liyi Gu
- Visiting Scientist
- Toshiki Sato
- Visiting Scientist
- Satoshi Nakahira
- Visiting Scientist
- Kazumi Asai
- Research Part-time Worker I
Contact Information
RIBF Bldg. Rm. 402,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: tamagawa [at] riken.jp