| Original Articles |
|
|
|
|
Density Dependence of the Detailed Spectral Line Effects on the Opacity of Astrophysical Abundant Elements: Oxygen |
| WANG Fei-Lu1;ZHAO Gang1;YUAN Jian-Min1,2 |
| 1National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
2Department of Applied Physics, National University of Defense Technology, Changsha 410073 |
|
| Cite this article: |
|
WANG Fei-Lu, ZHAO Gang, YUAN Jian-Min 2003 Chin. Phys. Lett. 20 1887-1890 |
|
|
|
Abstract A full relativistic detailed-level-accounting approach has been developed independently to deal with the detailed spectral line effects on the opacity of the third most abundant element in stars: oxygen. The atomic energy levels and the oscillator strengths of the radiative transitions between the energy levels are obtained by carrying out the full relativistic one-configuration Dirac-Fock calculations. The photoionization cross sections are obtained via an average atom scheme with a consideration for the splitting of the ionization threshold due to the ionization stages and the term-couplings. As an example, the spectra resolved opacities and the mean opacities of oxygen are calculated to show the importance of the detailed spectral line profiles with the density of the matter.
|
| Keywords:
95.30.Jx
95.30.Ky
97.10.Cv
52.25.Os
|
|
|
Published: 01 October 2003
|
|
| PACS: |
95.30.Jx
|
(Radiative transfer; scattering)
|
| |
95.30.Ky
|
(Atomic and molecular data, spectra, and spectralparameters (opacities, rotation constants, line identification, oscillator strengths, gf values, transition probabilities, etc.))
|
| |
97.10.Cv
|
(Stellar structure, interiors, evolution, nucleosynthesis, ages)
|
| |
52.25.Os
|
(Emission, absorption, and scattering of electromagnetic radiation ?)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
