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Suzaku detection of a highly carbon enriched plasma in BD +30°3639

Published online by Cambridge University Press:  15 December 2006

M. Kokubun ,
M. Murashima ,
K. Makishima ,
K. Matsushita ,
J. Kotoku ,
H. Murakami ,
K. Hayashida ,
H. Matsumoto ,
K. Hamaguchi  and
K. Arnaud
M. Kokubun
Affiliation:
Department of Physics, University of Tokyo, Bunkyo, Tokyo, 113-0033, Japan; email: kokubun@phys.s.u-tokyo.ac.jp
M. Murashima
Affiliation:
Department of Physics, University of Tokyo, Bunkyo, Tokyo, 113-0033, Japan; email: kokubun@phys.s.u-tokyo.ac.jp
K. Makishima
Affiliation:
Department of Physics, University of Tokyo, Bunkyo, Tokyo, 113-0033, Japan; email: kokubun@phys.s.u-tokyo.ac.jp Cosmic Radiation Laboratory, RIKEN, Wako, Saitama, 351-0198, Japan
K. Matsushita
Affiliation:
Department of Physics, Tokyo University of Science, Shinjuku, Tokyo, 162-8601, Japan
J. Kotoku
Affiliation:
Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo, 152-8551, Japan
H. Murakami
Affiliation:
ISAS/JAXA, Sagamihara, Kanagawa, 229-8510, Japan
K. Hayashida
Affiliation:
Department of Space and Earth Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
H. Matsumoto
Affiliation:
Department of Physics, Kyoto University, Sakyo-ku, Kyoto, 608-8502, Japan
K. Hamaguchi
Affiliation:
NASA/GSFC, Greenbelt, MD 20771, USA
K. Arnaud
Affiliation:
NASA/GSFC, Greenbelt, MD 20771, USA
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Abstract

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We have observed the X-ray brightest planetary nebula BD +30° 3639 with the new Japanese astronomical satellite Suzaku. With its superior spectral resolution back-illuminated CCD camera, a blend of K-lines from highly ionized C, N, O elements are successfully resolved into individual species, and an extremely high relative abundance ratio of C/O $\sim$ 40 is obtained. This strongly suggests the direct measurement of the helium shell-burning products.

Keywords

nuclear reactionsnucleosynthesisabundancesstars: mass lossplanetary nebulae: individual (BD +30° 3639)X-rays: individual (BD +30° 3639)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S234: Planetary Nebulae in our Galaxy and Beyond , April 2006 , pp. 165 - 168
Copyright
© 2006 International Astronomical Union