Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203.1087r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 203, P.1087, 1983
Astronomy and Astrophysics
Astronomy
21
Scientific paper
Seeing limited two-dimensional kinematic data for the Hα λ6536 Å and [Ni II] λ6583 Å lines have been obtained across the planetary nebula NGC 2392 using a wide field imaging Fabry-Perot interferometer (TAURUS).
We have used the data to construct a three- dimensional model for the nebula which shows it to be two concentric spheroidal shells viewed along their major axes. The inner shell has an axial ratio of 2 and is expanding with a velocity of 65 km s-1. Defined by the condensations, the outer shell has an axial ratio ≥ 1 and a maximum expansion velocity ˜75 km s-1. The condensations are set in a region of tenuous [O III] emission which is expanding at ˜30 km s-1. Interior to the inner surface of the inner shell there appears to be a component which is at rest with respect to the central star. The form of Wilson's observed spectral line profiles can be explained qualitatively in terms of simple stratification effects.
Atherton P. D.
Reay N. K.
Taylor Karen
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