Orientation of planetary nebulae within the Galaxy

Details Orientation of planetary nebulae within the Galaxy Orientation of planetary nebulae within the Galaxy

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.297..617c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 297, Issue 2, pp. 617-623.

Astronomy and Astrophysics

Astronomy

16

Planetary Nebulae: General, Galaxy: Structure

Scientific paper

Narrow-band CCD images of 209 axially symmetrical planetary nebulae (PNe) have been examined in order to determine the orientation of their axes within the disc of the Galaxy. The nebulae have been divided into the bipolar (B) and elliptical (E) PNe morphological types, according to the scheme of Corradi & Schwarz. In both classes, contrary to the results of Melnick & Harwit and Phillips we do not find any strong evidence for non-random orientations of the nebulae in the Galaxy. Compared with previous work in this field, the present study takes advantage of the use of larger and morphologically more homogeneous samples and offers a more rigorous statistical analysis.

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