Theoretical Models of Planetary Nebulae - Part Four - Influence of Charge Exchange Between Neutral Hydrogen and Double Ionized Oxygen
Abstract
Introduction of the O+++H0→O++H+ charge exchange rate suggested by Butler, Bender and Dalgarno leads to theoretical nebular models that differ from those previously computed in several important respects. Different elemental abundances, ‘bluer’ central star energy distributions, and truncated (material limited) models are required. If the argon abundance is fixed from the λ 7135 [Ar iii] line intensity, λ 4740 [Ar iv] is invariably predicted to be much too strong. Better atomic parameters, together with improved charge exchange rates for other ions, and more accurate dielectronic recombination rates may alleviate the situation.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- September 1980
- DOI:
- 10.1007/BF00642179
- Bibcode:
- 1980Ap&SS..72..203A
- Keywords:
-
- Astronomical Models;
- Charge Exchange;
- Planetary Nebulae;
- Abundance;
- Argon;
- Hydrogen;
- Oxygen Ions;
- Astrophysics