Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100.1903f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 100, Dec. 1990, p. 1903-1914.
Astronomy and Astrophysics
Astronomy
67
Halos, Paleontology, Planetary Nebulae, Stellar Envelopes, Stellar Winds, Charge Coupled Devices, Density Distribution, Stellar Mass Ejection
Scientific paper
The structures of PN shells and halos are studied in order to find clues to the history of mass ejection in the AGB stage. Data are presented which show that the emission measure profiles of shells of PN share several common observational properties. Constraints are placed on the form of the mass ejection that formed the shell, the external pressure that forces its postejection hydrodynamic evolution to the present, and the evolutionary timescales. Hydrodynamical simulations conducted to model the emission measure distribution of the shells and halos of PN show that mass is ejected in pulses whose duration is short compared to the AGB-PN evolutionary timescale, and that the linear form of the emission measure occurs about 5000 yr after the superwind ejection ceases.
Balick Bruce
Frank Adam
Riley James
No associations
LandOfFree
Stellar wind paleontology - Shells and halos of planetary nebulae 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 Stellar wind paleontology - Shells and halos of planetary nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar wind paleontology - Shells and halos of planetary nebulae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1629185