Cosmic X-ray Research Team
Team Head
Kazuo MAKISHIMA (D.Sci.)
The present research team utilizes comsic X-rays and gamma-rays, to probe into extreme astrophyscial objects including black holes and neutron stars, long-range electromagnetic interactions in space, and energy non-equipartition processes therein. The cosmic X-ray satellite Suzaku, launched in July 2005, is being used for versatile objectives. In July 2009, the MAXI (Monitor of All-sky X-ray Image) experiment, developed since 1997, has been launched by Space Shuttle, and installed on the Japan Experimental Module which constitute the International Space Station. By scanning the entire sky utilzing the Statioion's revolution, MAXI continuousuly monitor a large number of celestial X-ray sources with a high sensitivity. Already more than 20 reports were internationally distributred based on new MAXI results, including emergence of X-ray nova, brightening of known objects, and re-appearance of previously known sources. Intensity histories of about 100 objects are open to public at http://maxi.riken.jp/top/index.php.
- Observations and data release with MAXI (Monitor of All Sky X-ray Image) on the International Space Station
- Observations of black holes and other cosmic X-ray sources with the X-ray Satellite Suzaku
- Construction of a unified picture of maass-accreting black holes
- Investigation into spontaneous evolutionary phenomena related to tars, inckuding gama-ray bursts
- Enoto, T., Nakazawa, K., Makishima, K., Nakagawa, Y.E., Sakamoto, T., Ohno, M., Takahashi, T.,Terada, Y., Yamaoka, K., Murakami, T., and Takahashi, T.:
"Suzaku Discovery of a Hard X-Ray Tail in the Persistent Spectra from the Magnetar 1E 1547.0i5408 during its 2009 Activity"
Publ. Astron. Soc. Japan 62, in press (2009) - Nakajima, M., Mihara, T., and Makishima, K.:
"Energy-Dependent Harmonic Ratios of the Cyclotron Features of X0331+53 in the 2004-2005 Outburst"
Astrophys. J. 710, 1755-1768 (2010) - Matsuoka, M., Kawasaki, K., Ueno, S., Tomida, H., Kohama, M., Suzuki, M., Adachi, Y., Ishikawa, M., Mihara, T., Sugizaki, M., Isobe, N., Nakagawa, Y.,and Tsunemi, H. et al.:
"The MAXI Mission on the ISS: Science and Instruments for Monitoring All-Sky X-Ray Images"
Publ. Astron. Soc. Japan 61, 999-1010 (2009) - Yamada, S., Makishima, K., Uehara, Y., Nakazawa, K., Takahashi, H., Dotani, T., Ueda, Y., Ebisawa, K., Kubota, A., and Gandhi, P.:
"Is the Black Hole in GX 339-4 Really Spinning Rapidly?"
Astrophys. J. Lett 707. L109-L113 (2009) - Enoto, T., Nakagawa, Y. E., Rea, N., Esposito, P., Gütz, D., Hurley, K., Israel, G. L., Kokubun, M., Makishima, K., Mereghetti, S., Murakami, H., Nakazawa, K., Sakamoto, T., Stellar L., Tiengo, A., Turolla, R., Yamada, S., Yamaoka, K., Yoshida, A., and Zane, S.:
"Suzaku Observation of the New Soft Gamma Repeater SGR 0501+4516 in Outburst"
Astrophys. J. Lett 693. L122-L126 (2009) - Yamada, S., Itoh, T., Makishima, K., and Nakazawa, K.:
"Suzaku Results on the Obscured Low-Luminosity Active Galactic Nucleus in NGC 4258"
Publ. Astron. Soc. Japan 61, SP1, 309-319 (2009) - 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"
Publ. Astron. Soc. Japan 61, SP1, S387-S393 (2009) - Yamaoka,K., Endo, A., Enoto, T., Fukazawa, Y., Hara, R., Hanabata, Y., Hong, S., Kamae, T., Kira, C., Kodaka, N., Kokubun, S., Maeno, S., Makishima, K.,.and Miyawaki, R., et al.:
"Design and In-Orbit Performance of the Suzaku Wide-Band All-Sky Monitor."
Publ. Astron. Soc. Japan 61, SP1, S35-S53 (2009) - Miyawaki, R., Makishima, K., Yamada, S., Gandhi, P., Mizuno, T., Kubota, A., Tsuru, T.G., and Matsumoto, H.:
"Suzaku Observations of M 82 X-1 : Detection of a Curved Hard X-Ray Spectrum."
Publ. Astron. Soc. Japan 61, SP1, S263-S278 (2009) - 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."
Publ. Astron. Soc. Japan 61, SP1, S279-S289 (2009)