Molecules in NGC 6781 and other ringlike planetary nebulae

B. Zuckerman, J. H. Kastner, Bruce Balick, Ian Gatley

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


We report the detection of extended H2 [S(1), v = 1 → 0] and CO ( J = 1 → 0) emission from the ringlike planetary nebula NGC 6781 which, in many respects, appears to be a low surface brightness counterpart of the Ring nebula, NGC 6720. NGC 6781 is the fourth known member of a group of unusual planetary nebulae that display molecular outflows at velocities that are, apparently, considerably greater than the expansion velocity of the ionized gas. We also detected CO emission from NGC 3132 and NGC 6772, ringlike planetary nebulae with previously known H2 emission.

Original languageEnglish (US)
Pages (from-to)L59-L62
JournalAstrophysical Journal
Issue number2 PART 2
StatePublished - Jun 20 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Interstellar: molecules
  • Nebulae: planetary
  • Nebulae: structure


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