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Planetary Nebulae and Their Central Stars in the X-ray and EUV Regions

Published online by Cambridge University Press:  15 December 2006

Martín A. Guerrero
Martín A. Guerrero
Affiliation:
Instituto de Astrofísica de Andalucía, IAA-CSIC, Camino Bajo de Huétor, 50, E-18008 Granada, Spain email: mar@iaa.es
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Abstract

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Einstein, EXOSAT, and ROSAT X-ray observations of planetary nebulae detected soft photospheric X-ray emission from their central stars, but the diffuse X-ray emission from the shocked fast stellar wind in their interiors could not be unambiguously resolved. The new generation of X-ray observatories, Chandra and XMM-Newton, have finally resolved the diffuse X-ray emission from shocked fast winds in planetary nebula interiors. Furthermore, these observatories have detected diffuse X-ray emission from bow-shocks of fast collimated outflows impinging on the nebular envelopes, and unexpected hard X-ray point-sources associated with the central stars of planetary nebulae. Here I review the results of these new X-ray observations of planetary nebulae and discuss the promise of future observations.

Keywords

planetary nebulae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S234: Planetary Nebulae in our Galaxy and Beyond , April 2006 , pp. 153 - 160
Copyright
© 2006 International Astronomical Union