X-ray Observations of the Bipolar PNe NGC 2346 and NGC 7026

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dc.creatorGruendl, Robert A.
dc.creatorGuerrero, Martin A.
dc.creatorChu, You-Hua
dc.creatorWilliams, Rosa M.
dc.date2006-07-22
dc.date.accessioned2026-07-07T07:15:45Z
dc.date.available2026-07-07T07:15:45Z
dc.descriptionWe have obtained X-ray observations of the bipolar planetary nebulae (PNe) NGC 2346 and NGC 7026 with XMM-Newton. These observations detected diffuse X-ray emission from NGC 7026 but not from NGC 2346. The X-ray emission from NGC 7026 appears to be confined within the bipolar lobes of the PN and has spectral properties suggesting a thermal plasma emitting at a temperature of 1.1 +0.5/-0.2 times 10^6 K. The X-ray spectrum of NGC 7026 is modeled using nebular and stellar abundances to assess whether a significant amount of nebular material has been mixed into the shocked-wind, but the results of this comparison are not conclusive owing to the small number of counts detected. Observations of bipolar PNe indicate that diffuse X-ray emission is much less likely detected in open-lobed nebulae than closed-lobed nebulae, possibly because open-lobed nebulae do not have strong fast winds or are unable to retain hot gas.
dc.description6 pages, 3 figures, Uses emulateapj.cls. Accepted for publication in ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0607519
dc.identifierhttp://arxiv.org/abs/astro-ph/0607519
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/113329
dc.subjectAstrophysics
dc.titleX-ray Observations of the Bipolar PNe NGC 2346 and NGC 7026
dc.typetext

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