Multiple Halos in Planetary Nebulae

Details Multiple Halos in Planetary Nebulae Multiple Halos in Planetary Nebulae

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.8108h&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #81.08; Bulletin of the American Astronomical Society, Vol. 27, p.1403

Astronomy and Astrophysics

Astronomy

Scientific paper

We present deep images of eight planetary nebulae in the light of Hα and [OIII], revealing several previously undetected halos. Based on this new evidence for multiple ejections from the planetary nebula nucleus, we comment on the evolutionary history of these sources. Furthermore, we discuss the ejection mechanisms which generate shells with differing geometric configurations for a single planetary nebula. Finally, by comparing the brightness distributions for the two emission lines, we report on the ionization structure of the nebulae surveyed.

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