Abundance anomalies in the X-ray spectra of the planetary nebulae NGC 7027 and BD +30◦3639

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dc.contributor.author Maness, Holly en_US
dc.contributor.author Vrtilek, Saeqa en_US
dc.contributor.author Soker, Noam en_US
dc.contributor.author Kastner, Joel en_US
dc.date.accessioned 2006-05-22T19:39:12Z en_US
dc.date.available 2006-05-22T19:39:12Z en_US
dc.date.issued 2003-05-20 en_US
dc.identifier.citation Astrophys.J. 589 (2003) 439-443 en_US
dc.identifier.issn 1538-4365 en_US
dc.identifier.uri http://hdl.handle.net/1850/1846 en_US
dc.description Also archived in: arXiv: astro-ph/0301613 v1 30 Jan 2003 en_US
dc.description.abstract We revisit Chandra observations of the planetary nebulae NGC 7027 and BD +30◦3639 in order to address the question of abundance anomalies in the X-ray emitting gas. Enhanced abundances relative to solar of magnesium (Mg) for NGC 7027 and neon (Ne) for BD +30◦ 3639 are required to fit their X-ray spectra, whereas observations at optical and infrared wavelengths show depleted Mg and Ne in these systems. We attribute the enhancement of Mg in NGC 7027 in the X-ray, relative to the optical, to the depletion of Mg onto dust grains within the optical nebula. For BD +30◦ 3639, we speculate that the highly enhanced Ne comes from a WD companion, which accreted a fraction of the wind blown by the asymptotic giant branch progenitor, and went through a nova-like outburst which enriched the X-ray emitting gas with Ne (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship We would like to thank our referee, Dr. R. Corradi for his thoughtful comments. H.M. was supported by the NSF REU program at SAO. S.D.V. was supported in part by NASA Grant NAG5-6711. J.H.K. acknowledges support for this research provided by NASA/CXO grants GO0–1067X and GO2-3009X to RIT. N.S. acknowledges support from the US-Israel Binational Science Foundation and the Israel Science Foundation. en_US
dc.format.extent 135535 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. 589 en_US
dc.relation.ispartofseries no. 1 en_US
dc.subject Planetary nebulae - general en_US
dc.subject Planetary nebulae - individual - BD +30◦3639, NGC 7027 en_US
dc.subject Stars - winds, outflows en_US
dc.subject X-rays - ISM en_US
dc.title Abundance anomalies in the X-ray spectra of the planetary nebulae NGC 7027 and BD +30◦3639 en_US
dc.type Article en_US

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