Abstract
We present the first detailed spatiokinematical analysis and modelling of the planetary nebula Shapley 1 (Sp 1), which is known to contain a close-binary central star system. Close-binary central stars have been identified as a likely source of shaping in planetary nebulae, but with little observational support to date. Deep narrow-band imaging in the light of [Oiii]λ5007Å suggests the presence of a large bow shock to the west of the nebula, indicating that it is undergoing the first stages of an interaction with the interstellar medium. Further narrow-band imaging in the light of Hα+ [Nii]λ6584Å combined with long-slit observations of the Hα emission have been used to develop a spatiokinematical model of Sp 1. The model clearly reveals Sp 1 to be a bipolar, axisymmetric structure viewed almost pole-on. The symmetry axis of the model nebula is within a few degrees of perpendicular to the orbital plane of the central binary system - strong evidence that the central close-binary system has played an important role in shaping the nebula. Sp 1 is one of the very few nebulae to have this link, between nebular symmetry axis and binary plane, shown observationally. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Original language | English |
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Pages (from-to) | 2271-2279 |
Number of pages | 8 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 420 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2012 |
Keywords
- Binaries: close
- Circumstellar matter
- Planetary nebulae: individual: PN G329.0+01.9
- Planetary nebulae: individual: Sp 1
- Stars: mass-loss
- Stars: winds, outflows