Chemical abundances in planetary nebulae - Basic data and correlations between elements

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Astrophysical Journal, Supplement Series; (United States)

DOI:https://doi.org/10.1086/191578· OSTI ID:5588667

Perinotto, M ^[1]

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1. Firenze, Universita, Florence (Italy)

To form a critical compilation of the abundances of He, C, N, O and Ne, all the individual determinations of chemical abundances in PN obtained with linear detectors have been considered. The data cover all observations of the Galactic PN made in the 20 years up to the end of 1989. Average chemicql abundances have been evaluated separately for nebulae of type I and of types II-III of Peimbert. For the first, they are He/H = 0.137, C/H = 8.72, N/H = 8.60, O/H = 8.66, and Ne/H = 8.05. For the second they are He/H = 0.103, C/H= 8.82, N/H = 8.07, O/H = 8.66, and Ne/H = 7.99, in the usual units. The data analysis suggests that the enrichment of nitrogen in type I PNs is due mostly to the ON cycle, while that in PNs of type II-III is due mostly to the CN cycle. 112 refs.

• OSTI ID: 5588667
• Journal Information: Astrophysical Journal, Supplement Series; (United States), Journal Name: Astrophysical Journal, Supplement Series; (United States) Vol. 76; ISSN APJSA; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CARBON
CHEMICAL COMPOSITION
CNO CYCLE
DATA ANALYSIS
ELEMENT ABUNDANCE
ELEMENTS
FLUIDS
GALAXIES
GASES
HELIUM
MILKY WAY
NEBULAE
NEON
NITROGEN
NONMETALS
OXYGEN
PLANETARY NEBULAE
RARE GASES
STAR BURNING
STAR EVOLUTION