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2008MNRAS.386...22T - Mon. Not. R. Astron. Soc., 386, 22-46 (2008/May-1)
Integral field spectroscopy of planetary nebulae: mapping the line diagnostics and hydrogen-poor zones with VLT FLAMES.
TSAMIS Y.G., WALSH J.R., PEQUIGNOT D., BARLOW M.J., DANZIGER I.J. and LIU X.-W.
Abstract (from CDS):
It is argued that these results provide further evidence for the existence in run-of-the-mill PNe of a distinct nebular component consisting of hydrogen-deficient, super-metal-rich plasma. The zones containing this posited component appear as undulations in the Cii and Oii ORL abundance diagnostics of about 2 spatial pixels across, and so any associated structures should have physical sizes of less than ∼1000 astronomical units. Regarding the origin of the inferred zones, we propose that circumstellar discs, Abell 30-type knots, or Helix-type cometary globules may be involved. Implications for emission-line studies of nebulae are discussed.
Abstract Copyright: ©2008 The Authors. Journal compilation © 2008 RAS
Journal keyword(s): ISM: abundances - planetary nebulae: general - planetary nebulae: individual: NGC 5882 - planetary nebulae: individual: NGC 6153 - planetary nebulae: individual: NGC 7009
Simbad objects: 12
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