Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...472l..45m&link_type=abstract
Astrophysical Journal Letters v.472, p.L45
Astronomy and Astrophysics
Astronomy
18
Ism: Planetary Nebulae: Individual Alphanumeric: A30
Scientific paper
The remarkable velocity structure of the different components of the hydrogen-deficient planetary nebula Abell 30 have been revealed for the first time by obtaining spatially resolved profiles of the [O III] lambda 5007 lines with the Manchester echelle spectrometer combined with the 2.1 m San Pedro Martir telescope. The outer 2' diameter shell is shown to be a mild ellipsoid expanding along its minor axis at 38.5 km s-1. The radial motions of the prominent knots in the core are consistent to some extent with their origin in radiatively ionized clumps in both an equatorial disk and polar directions all expanding radially from the star at ~39 km s-1. However, it is the +/-200 km s-1 velocity "spikes" in the position-velocity arrays of [O III] lambda 5007 profiles over the edges of the irregular shells surrounding the bright core that give direct evidence of the presence of ablated flows driven by the fast wind from the central star.
Lopez Jose Alberto
Meaburn John
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