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- W3100691242 abstract "We present [N ii] and Hα images and high-resolution long-slit spectra of the planetary nebula IC 4846, which reveal, for the first time, its complex structure and the existence of collimated outflows. The object consists of a moderately elongated shell, two (and probably three) pairs of collimated bipolar outflows at different orientations, and an attached circular shell. One of the collimated pairs is constituted by two curved, extended filaments the properties of which indicate a high-velocity, bipolar precessing jet. A difference of ≃10 km s−1 is found between the systemic velocity of the precessing jets and the centroid velocity of the nebula, as recently reported for Hu 2-1. We propose that this difference is as a result of orbital motion of the ejection source in a binary central star. The orbital separation of and period estimated for the binary are similar to those in Hu 2-1, linking the central stars of both planetary nebulae to interacting binaries. Extraordinary similarities also exist between IC 4846 and the bewildering planetary nebula NGC 6543, suggesting a similar formation history for both objects." @default.
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- W3100691242 date "2001-03-01" @default.
- W3100691242 modified "2023-09-23" @default.
- W3100691242 title "Precessing collimated outflows in the planetary nebula IC 4846" @default.
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- W3100691242 doi "https://doi.org/10.1046/j.1365-8711.2001.04145.x" @default.
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