Cosmic Radiation Laboratory
Research Areas
Using mainly energetic photons, we study particle acceleration, supernovae, gamma-ray bursts, cosmic nucleosynthesis, formation and evolution of black holes、and the neutron-star magnetism. The HETE-2 satellite has identified the origin of gamma-ray bursts which remained a long puzzle. In collaboration with several institutions, we have developed the Hard X-ray Detector (HXD) onboard the Suzaku satellite, launched in 2005 July. With the HXD, we are studying a wide range of cosmic extreme phenomena. We are also developing an X-ray all-sky monitor experiment, MAXI, to be put onboard the International Space Station in may 2009. Our activities also cover an automated optical search for gamma-ray bursts, solar neutron monitoring at Tibet, chemical analysis of antarctic ice cores for past solar cycles, developments of X-ray polarimeters, deep surveys with large telescopes, searches for gravitational lenses, study of interstellar fullerene, and simulations of gas accretion onto black holes.
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List of Selected Publications
| (1) | Kawaharada, M., Makishima, K., Kitaguchi, T., Okuyama, S., Nakazawa, K., Matsushita, K., and Fukazawa, Y.: "A Galaxy Merger Scenario for the NGC 1550 Galaxy from Metal Distributions in the X-Ray Emitting Plasma." Astrophysical Journal 691, 971-983 (2009) |
| (2) | Nakagawa, Y.E., Mihara, T., Yoshida, A, Yamaoka, K., Sugita, S., Murakami, T., Yonetoku, D., Suzuki, M., Nakajima, M., Tashiro, M.S., and Nakazawa, K.: "Suzaku Observations of SGR1900+14 and SGR1806-20." Publications of Astronomical Society of Japan 61, SP1, S387-S393 (2009) |
| (3) | Isobe, N., Makishima, K., Takahashi, H., Mizuno, T., Miyawaki, R., Gandhi, P., Kawaharada, M., Senda, A., Yoshida, A., Kubota, A., and Kobori, H.: "Spectral Transitions of an Ultraluminous X-Ray Source, NGC 2403 Source 3." Publications of Astronomical Society of Japan 61, SP1, S279-S289 (2009) |
| (4) | Yamaguchi, H., Bamba, A., and Koyama, K.: "Suzaku Observations of 30 Dor C: A Supernova Remnant with the Largest Non-Thermal Shell." Publications of Astronomical Society of Japan 61, SP1, S175-S181 (2009) |
| (5) | Tamagawa, T., Hayato, A., Nakamura, S., Terada, Y., Bamba, A., Hiraga, J. S., Hughes, J. P., and Hwang, U. et al.: "Suzaku Observation of Tycho's Supernova Remnant." Publications of Astronomical Society of Japan 61, SP1, S167-S174 (2009) |
| (6) | Makishima, K., Takahashi, H., Yamada, S., Done, C., Kubota, A., Dotani, T., Ebisawa, K., Itoh, T., Kitamoto, S., Negoro, H., Ueda, Y., and Yamaoka, K.: "Suzaku Results on Cygnus X-1 in the Low/Hard State." Publications of Astronomical Society of Japan, 60, 585-604 (2008) |
| (7) | Gandhi, P., Makishima, K., Durant, M., Fabian, A. C., Dhillon, V. S., Marsh, T. R., Miller, J. M., Shahbaz, T., and Spruit, H. C.: "Rapid Optical and X-ray Timing Observations of GX 339-4: Flux Correlations at the Onset of a Low/Hard State." Monthly Notices of Royal Astronomical Society 390, L29-L33 (2008) |
| (8) | Inada, N., Oguri, M., Falco, E. E., Broadhurst, T. J., Ofek, E. O., Kochanek, C. S., Sharon, K., and Smith, G.P.: "Spectroscopic Confirmation of the Fifth Image of SDSS J1004+4112 and Implications for the M_BH-σ Relation at z = 0.68." Publications of Astronomical Society of Japan 60, 27-30 (2008) |
| (9) | Misawa, T., Charlton, Jane C., and Narayanan, A.: "Supersolar Metallicity in Weak Mg II Absorption Systems at z = 1.7." Astrophysical Journal 679, 220-238 (2008) |
| (10) | Ota, K., Iye, M., Kashikawa, N., Shimasaku, K., Kobayashi, M.,Totani, T., Nagashima, M., Morokuma, T., et al.: "Reionization and Galaxy Evolution Probed by z = 7 Lyα Emitters." Astrophysical Journal 677, 12-26 (2008) |