Non-LTE calculations of AL III line strengths in early-type stars
Abstract
Non-LTE line formation calculations, based on the 'complete linearization method' are presented for the Al III ion in early-type stars. Equivalent widths, together with the corresponding LTE values, are tabulated for 15 ultraviolet and visible region transitions, for effective temperatures from 20000 to 35000K, logarithmic gravities of 3.5, 4.0 and 4.5, microturbulent velocities of 0 and 5 km s-1 and logarithmic aluminium abundances of 6.0, 6.5 and 7.0. The non-LTE line strengths are significantly larger than the LTE values particularly for the visible region transitions and the implications of this are briefly discussed.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 1986
- DOI:
- Bibcode:
- 1986MNRAS.222..713D
- Keywords:
-
- Abundance;
- Aluminum;
- Early Stars;
- Line Spectra;
- Nonequilibrium Thermodynamics;
- Stellar Spectra;
- Main Sequence Stars;
- Stellar Atmospheres;
- Stellar Models;
- Astrophysics