Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-02-08
Astronomy and Astrophysics
Astrophysics
postscript file, 8 pages, no figures. Accepted for publication in the Proceedings of the Astronomical Society of Australia
Scientific paper
A novel explanation for the origin of the cometary globules within NGC 7293 (the "Helix" planetary nebula) is examined; that these globules originate as massive cometary bodies at large astrocentric radii. The mass of such hypothetical cometary bodies would have to be several orders of magnitude larger than any such bodies observed in our solar system in order to supply the observed mass of neutral gas. It is however shown that comets at "outer Oort cloud" like distances are likely to survive past the red giant and asymptotic giant branch evolutionary phases of the central star, allowing them to survive until the formation of the planetary nebula. Some observational tests of this hypothesis are proposed.
No associations
LandOfFree
A Speculation into the Origin of Neutral Globules In Planetary Nebulae: Could the Helix's Comets Really Be Comets? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Speculation into the Origin of Neutral Globules In Planetary Nebulae: Could the Helix's Comets Really Be Comets?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Speculation into the Origin of Neutral Globules In Planetary Nebulae: Could the Helix's Comets Really Be Comets? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-652470