Proof of polar ejection fom the close-binary core of the planetary nebula Abell 63

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dc.creatorMitchell, Deborah L.
dc.creatorPollacco, Don
dc.creatorO'Brien, T. J.
dc.creatorBryce, M.
dc.creatorLopez, J. A.
dc.creatorMeaburn, J.
dc.creatorVaytet, N. M. H.
dc.date2006-11-08
dc.date.accessioned2026-07-07T10:24:13Z
dc.date.available2026-07-07T10:24:13Z
dc.descriptionWe present the first detailed kinematical analysis of the planetary nebula Abell 63, which is known to contain the eclipsing close-binary nucleus UU Sge. Abell 63 provides an important test case in investigating the role of close-binary central stars on the evolution of planetary nebulae. Longslit observations were obtained using the Manchester echelle spectrometer combined with the 2.1-m San Pedro Martir Telescope. The spectra reveal that the central bright rim of Abell 63 has a tube-like structure. A deep image shows collimated lobes extending from the nebula, which are shown to be high-velocity outflows. The kinematic ages of the nebular rim and the extended lobes are calculated to be 8400+/-500 years and 12900+/-2800 years, respectively, which suggests that the lobes were formed at an earlier stage than the nebular rim. This is consistent with expectations that disk-generated jets form immediately after the common envelope phase. A morphological-kinematical model of the central nebula is presented and the best-fit model is found to have the same inclination as the orbital plane of the central binary system; this is the first proof that a close-binary system directly affects the shaping of its nebula. A Hubble-type flow is well-established in the morphological-kinematical modelling of the observed line profiles and imagery. Two possible formation models for the elongated lobes of Abell 63 are considered (1) a low-density, pressure-driven jet excavates a cavity in the remnant AGB envelope; (2) high-density bullets form the lobes in a single ballistic ejection event.
dc.description11 pages, 8 figures, accepted by MNRAS for publication
dc.identifierhttps://arxiv.org/abs/astro-ph/0611268
dc.identifierhttp://arxiv.org/abs/astro-ph/0611268
dc.identifierMon.Not.Roy.Astron.Soc.374:1404-1412,2007
dc.identifierdoi:10.1111/j.1365-2966.2006.11251.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176108
dc.subjectAstrophysics
dc.titleProof of polar ejection fom the close-binary core of the planetary nebula Abell 63
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