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The Central Region of the Planetary Nebula A58

Published online by Cambridge University Press:  07 August 2017

D.L. Pollacco ,
P.W. Hill  and
R.E.S. Clegg
D.L. Pollacco
Affiliation:
Department of Physics and Astronomy, North Haugh, St. Andrews, Fife KY16 9SS, Scotland
P.W. Hill
Affiliation:
Department of Physics and Astronomy, North Haugh, St. Andrews, Fife KY16 9SS, Scotland
R.E.S. Clegg
Affiliation:
Royal Greenwich Observatory, Madingley Road, Cambridge, CB3 OEZ, England

Extract

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We present images and high–resolution spectra of the hydrogen deficient knot at the centre of the old planetary nebula A58. The spectra confirm that this region contains essentially no hydrogen, as previously suspected. Emission lines from the knot are broad (FWHM ∼ 180 and 270 km/s for [NII] and [OIII] lines respectively) and are blue–shifted by ∼100 km/s relative to the systematic velocity.

Type
IV. Planetary Nebulae Connection: Evolution from the AGB
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 387
Copyright
Copyright © Kluwer 1993