On the luminosities and temperatures of extended X-ray emission from planetary nebulae

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dc.contributor.author Soker, Noam en_US
dc.contributor.author Kastner, Joel en_US
dc.date.accessioned 2006-05-22T20:24:39Z en_US
dc.date.available 2006-05-22T20:24:39Z en_US
dc.date.issued 2003-01-20 en_US
dc.identifier.citation Astrophys.J. 583 (2003) 368-373 en_US
dc.identifier.issn 1538-4365 en_US
dc.identifier.uri http://hdl.handle.net/1850/1850 en_US
dc.description Also archived in: arXiv: astro-ph/0209139 v1 9 Sep 2002 en_US
dc.description.abstract We examine mechanisms that may explain the luminosities and relatively low temperatures of extended X-ray emission in planetary nebulae. By building a simple flow structure for the wind from the central star during the proto, and early, planetary nebulae phase, we estimate the temperature of the X-ray emitting gas and its total X-ray luminosity. We conclude that in order to account for the X-ray temperature and luminosity, both the evolution of the wind from the central star and the adiabatic cooling of the post-shocked wind’s material must be considered. The X-ray emitting gas results mainly from shocked wind segments that were expelled during the early planetary nebulae phase, when the wind speed was moderate, ~500 km s^−1. Alternatively, the X-ray emitting gas may result from a collimated fast wind blown by a companion to the central star. Heat conduction and mixing between hot and cool regions are likely to occur in some cases and may determine the detailed X-ray morphology of a nebula, but are not required to explain the basic properties of the X-ray emitting gas (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship J.H.K. acknowledges support for this research provided by NASA/CXO grant GO0–1067X to RIT. N.S. acknowledges support from the US-Israel Binational Science Foundation. en_US
dc.format.extent 114493 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Astrophysical Journal en_US
dc.relation.ispartofseries vol. 583 en_US
dc.relation.ispartofseries no. 1 en_US
dc.subject Planetary nebulae - general en_US
dc.subject Stars - mass loss en_US
dc.subject Stars - winds, outflows en_US
dc.subject X-rays - ISM en_US
dc.title On the luminosities and temperatures of extended X-ray emission from planetary nebulae en_US
dc.type Article en_US

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