Discovery of multiple coaxial rings in the quadrupolar planetary nebula NGC 6881

Sun Kwok, Kate Y.L. Su

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We report the discovery of multiple two-dimensional rings in the quadrupolar planetary nebula NGC 6881. As many as four pairs of rings are seen in the bipolar lobes, and three rings are seen in the central torus. While the rings in the lobes have the same axis as one pair of the bipolar lobes, the inner rings are aligned with the other pair. The two pairs of bipolar lobes are likely to be carved out by two separate high-velocity outflows from the circumstellar material left over from the asymptotic giant branch (AGB) wind. The two-dimensional rings could be the results of dynamical instabilities or the consequence of a fast outflow interacting with remnants of discrete AGB circumstellar shells.

Original languageEnglish (US)
Pages (from-to)L49-L52
JournalAstrophysical Journal
Volume635
Issue number1 II
DOIs
StatePublished - Dec 10 2005
Externally publishedYes

Keywords

  • Planetary nebulae: general
  • Stars: AGB and post-AGB
  • Supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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