X-ray emission from the pre-planetary nebula Henize 3-1475

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dc.contributor.author Sahai, Raghvendra en_US
dc.contributor.author Kastner, Joel en_US
dc.contributor.author Frank, Adam en_US
dc.contributor.author Morris, Mark en_US
dc.contributor.author Blackman, Eric en_US
dc.date.accessioned 2006-05-22T19:02:55Z en_US
dc.date.available 2006-05-22T19:02:55Z en_US
dc.date.issued 2003-12-20 en_US
dc.identifier.citation Astrophys.J.L. 599 (2003) L87-L90 en_US
dc.identifier.issn 1538-4365 en_US
dc.identifier.uri http://hdl.handle.net/1850/1842 en_US
dc.description Also archived in: arXiv: astro-ph/0312130 v1 4 Dec 2003 en_US
dc.description.abstract We report the first detection of X-ray emission in a pre-planetary nebula, Hen 3-1475. Pre-planetary nebulae are rare objects in the short transition stage between the Asymptotic Giant Branch and planetary nebula evolutionary phases, and Hen 3-1475, characterized by a remarkable S-shaped chain of optical knots, is one of the most noteworthy members of this class. Observations with the Advanced CCD Imaging Spectrometer (ACIS) onboard the Chandra X-Ray observatory show the presence of compact emission coincident with the brightest optical knot in this bipolar object, which is displaced from the central star by 2.7" along the polar axis. Model fits to the X-ray spectrum indicate an X-ray temperature and luminosity, respectively, of (4.3 − 5.7)×10^6 K and (4 ± 1.4) × 10^31 (D/5 kpc)^2 erg s^−1, respectively. Our 3-sigma upper limit on the luminosity of compact X-ray emission from the central star in Hen 3-1475 is ~5 × 10^31 (D/5 kpc)^2 erg s^−1. The detection of X-rays in Hen 3-1475 is consistent with models in which fast collimated post-AGB outflows are crucial to the shaping of planetary nebulae; we discuss such models in the context of our observations (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship We are thankful for partial financial support for this work provided by NASA through its Long Term Space Astrophysics program (grant no. 399-30-61-00-00) for R.S. and M.M., as well as through Chandra Awards GO2-3029X (for R.S.) and GO2-3009X (for J.H.K./RIT) issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory on behalf of NASA under contract NAS8-39073. en_US
dc.format.extent 347692 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Astrophysical Journal Letters en_US
dc.relation.ispartofseries vol. 599 en_US
dc.relation.ispartofseries no. 2 en_US
dc.subject Circumstellar matter en_US
dc.subject ISM - jets and outflows en_US
dc.subject Planetary nebulae - individual - He 3-1475 en_US
dc.subject Stars - AGB and post-AGB en_US
dc.subject Stars - mass loss en_US
dc.subject X-rays - ISM en_US
dc.title X-ray emission from the pre-planetary nebula Henize 3-1475 en_US
dc.type Article en_US

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