Galactic planetary nebulae and evolution of their nuclei
Journal Article
·
· Astrophysics (Engl. Transl.); (United States)
The galactic system of planetary nebulae is investigated using previously constructed distance scale and kinematics data. A strong effect of observational selection is established, which has the consequence that with increasing distance, ever brighter and younger objects are observed. More accurate determinations of the spatial and surface densities of the planetary nebulae system are obtained as well as a new estimate of their total number in the Galaxy, which is approximately 200,000. New estimates are also made of the masses of the nebulae, the absolute magnitudes of the nebulae and their nuclei, and other physical parameters of these objects. The spatial and kinematic characteristics of the planetary nebulae indicate that they are objects of the old type I population. It is possible that their remote ancestors are main sequence stars of the type B8-A5-F or as yet unidentified objects of the same galactic subsystem.
- Research Organization:
- Akademiia Nauk SSSR, Astronomicheskii Sovet, Moscow, USSR
- OSTI ID:
- 6769843
- Journal Information:
- Astrophysics (Engl. Transl.); (United States), Journal Name: Astrophysics (Engl. Transl.); (United States) Vol. 15:3; ISSN ATPYA
- Country of Publication:
- United States
- Language:
- English
Similar Records
KINEMATIC DISTANCES OF GALACTIC PLANETARY NEBULAE
Evolution of planetary nebula nuclei
New planetary nebulae in the direction of the Galactic bulge
Journal Article
·
Tue Mar 15 00:00:00 EDT 2016
· Astrophysical Journal, Supplement Series
·
OSTI ID:22519977
Evolution of planetary nebula nuclei
Thesis/Dissertation
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:5658425
New planetary nebulae in the direction of the Galactic bulge
Journal Article
·
Sat Jun 01 00:00:00 EDT 1991
· Publications of the Astronomical Society of the Pacific; (United States)
·
OSTI ID:5318783