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High-resolution X-ray Spectroscopy of BD +30°3639

Published online by Cambridge University Press:  15 December 2006

Joel H. Kastner ,
Young Sam Yu ,
John Houck ,
Ehud Behar ,
Raanan Nordon  and
Noam Soker
Joel H. Kastner
Affiliation:
Center for Imaging Science, Rochester Institute of Technology, Rochester, NY 14623, USA; email: [email protected]
Young Sam Yu
Affiliation:
Center for Imaging Science, Rochester Institute of Technology, Rochester, NY 14623, USA; email: [email protected]
John Houck
Affiliation:
MIT Kavli Institute, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Ehud Behar
Affiliation:
Department of Physics, Technion – Israel Institute of Technology, Haifa 32000, Israel
Raanan Nordon
Affiliation:
Department of Physics, Technion – Israel Institute of Technology, Haifa 32000, Israel
Noam Soker
Affiliation:
Department of Physics, Technion – Israel Institute of Technology, Haifa 32000, Israel
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Abstract

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We present preliminary results from the first X-ray gratings spectrometer observations of a planetary nebula (PN). We have used the Chandra X-ray Observatory Low Energy Transmission Gratings Spectrometer (LETGS) to observe the bright, diffuse X-ray source within the well-studied BD +30°3639. The LETGS spectrum of BD +30°3639 displays prominent and well-resolved emission lines of H-like C, O, and Ne and He-like O and Ne. Initial modeling indicates a plasma temperature $T_X \sim 2.5\times10^6$ K and abundance ratios of C/O $\sim20$, N/O $\stackrel{<}{\sim}1$, Ne/O $\sim4$, and Fe/O $\stackrel{<}{\sim}0.1$. These results suggest that the X-ray-emitting plasma is dominated by the shocked fast wind from the emerging PN core, where this wind gas likely originated from the intershell region of the progenitor asymptotic giant branch star.

Keywords

stars: 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. 169 - 172
Copyright
© 2006 International Astronomical Union