Cosmic Radiation Laboratory

Staff

Research Areas

In the immediate aftermath of the Big Bang, the beginning of the universe, only hydrogen and helium existed. However, nuclear fusion in the interior of stars and the explosion of supernovae in the universe over the course of 13.7 billion years led to the evolution of a world brimming with the many different elements we have today. By using man-made satellites to observe X-rays and gamma rays emitted from celestial bodies, we are observing the creation of the elements at their actual source. Our goal is to comprehensively elucidate the scenarios for the formation of the elements in the universe, together with our research on atomic nuclei through the use of an accelerator.

Research Subject

1. Nucleosynthesis in Supernovae
2. Particle Acceleration Mechanism in Astronomical Objects
3. Physics in Extremely Strong Magnetism and Gravity
4. Research and Development of Innovative X-ray and Gamma-ray detectors

プレスリリース

• Scientists uncover influence of universe's large-scale structure on galaxy cluster growth

List of Selected Publications

1. The Hitomi collaboration:
   "The quiescent intracluster medium in the core of the Perseus cluster"
   Nature, 535, 117-121 (2016).
   
2. Iwakiri, W. B., Black, J. K., Cole, R., Enoto, T., Hayato, A., Hill, J. E., Jahoda, K., Kaaret, P., Kitaguchi, T., Kubota, M., Marlowe, H., McCurdy, R., Takeuchi, Y., Tamagawa, T.:
   "Performance of the PRAXyS X-ray polarimeter",
   Nuclear Inst. and Methods in Physics Research, A, 838, 89 (2016).
   
3. Serino, M., Iwakiri, W., Tamagawa, T., Sakamoto, T., Nakahira, S., Matsuoka, M., Yamaoka, K., Negoro, H.
   "MAXI observations of long X-ray bursts"
   Publications of the Astronomical Society of Japan, 68, 95 (2016).
   
4. Kita, H., Kimura, T., Tao, C., Tsuchiya, F., Misawa, H., Sakanoi, T., Kasaba, Y., Murakami, G., Yoshioka, K., Yamazaki, A.:
   "Characteristics of solar wind control on Jovian UV auroral activity deciphered by long-term Hisaki EXCEED observations: Evidence of preconditioning of the magnetosphere?"
   Geophysical Research Letters, 43, 6790-6798, (2016).
   
5. Takeuchi, Y., Yamaguchi, H., Tamagawa, T.:
   "A systematic study of evolved supernova remnants in the large and small Magellanic Clouds with Suzaku"
   Publications of the Astronomical Society of Japan, 68, S9 (2016).
   
6. Okura, Y., Petri, A., May, M., Plazas, A. A., Tamagawa, T.:
   "Consequences of CCD Imperfections for Cosmology Determined by Weak Lensing Surveys: From Laboratory Measurements to Cosmological Parameter Bias"
   The Astrophysical Journal, 825, 61 (2016).
   
7. Nakano, T., Murakami, H., Furuta, Y., Enoto, T., Masuyama, M., Shigeyama, T., Makishima, K.:
   "Study of the progenitor of the magnetar 1E 2259+586 through Suzaku observations of the associated supernova remnant CTB 109"
   Publications of the Astronomical Society of Japan, 69, 40 (2017).
   
8. Terada, Y., Maeda, K., Fukazawa, Y., Bamba, A., Ueda, Y., Katsuda, S., Enoto, T., Takahashi, T., Tamagawa, T., Röpke, F. K., Summa, A., Diehl, R.:
   "Measurements of the Soft Gamma-Ray Emission from SN2014J with Suzaku"
   The Astrophysical Journal, 823, 43, (2016).
   
9. Jahoda, K., Kallman, T., Kouveliotou, C., Lorella, A., Black, J. K., Hill, J. E., Jaeger, T., Kaaret, P., Markwardt, C. B., Okajima, T., Petre, R., Schnittman, J., Soong, Y., Strohmayer, T. E., Tamagawa, T., Tawara, Y.
   "The Polarimeter for Relativistic Astrophysical X-ray Sources"
   Proceedings of the SPIE, 9905, 990516 (2016).