Tübingen NLTE Model-Atmosphere Fluxes
We provide here grids of NLTE stellar model-atmosphere fluxes which, cover the parameter range of planetary nebula (PN) with hot central stars (CSPN): Teff = 50 - 190 kK, log (g / cm/s2) = 5 - 9. Partly tables for an individual chemical composition are more/less extended.
These fluxes may be used, e.g., as ionizing spectra in PN modeling.
The user of these model-atmosphere fluxes should be aware, that they should only be used in a PN analysis if the central star's abundances are in agreement with the model abundances. The use of fluxes from models with solar abundance ratios will spoil any PN analysis if the exciting star is hydrogen deficient!
Please do not hesitate to contact us directly.
| name | chemical composition | date of release | comment |
| H | pure H | May 2007 | Teff = 20 - 1000 kK log (g / cm/s2) = 4 - 9 |
| He | pure He | Jun 2004 | Teff = 50 - 190 kK log (g / cm/s2) = 4 - 9 |
| H+He | H+He | Aug 2004 | abundance ratios: He:H = 10-9, 0.1, 0.2, ..., 0.9, 109 by mass |
| H+He 0.605 | H+He | Mar 2001 | models following an evolutionary track of a post-AGB star with 0.605 MSun core mass |
| H-Ca | all elements from H to Ca | May 2001 | |
| H-Ni | all elements from H to Ni | Nov 2002 | |
| He+C+N+O | He+C+N+O | Jan 2006 | abundance ratios: He:C:N:O=33:50:2:15 by mass |
| H+He+C+N+O+Ne+Mg+Si+S+Ca-Ni | H+He+C+N+O+Ne+Mg+Si+S+Ca-Ni | Jul 2010 | abundance ratios: see table (follow link) |
The H-Ca and H-Ni grids give stellar model-atmosphere fluxes for solar and halo abundance ratios.
The first generation (H-Ca) includes the opacities of light metals.
The second generation (H-Ni) includes detailed Ca as well as iron-group (Sc+Ti+V+Cr+Mn+Fe+Co+Ni) opacities (with millions of lines) following
- Implications of light metals (Li - Ca) on NLTE model atmospheres for hot stars
Rauch T. 1996,
in: Supersoft X-ray Sources, ed. J. Greiner, Lecture Notes in Physics, Springer, Berlin, p. 139 - Implication of light metals (Li - Ca) on NLTE model atmospheres of compact hot stars
Rauch T. 1997,
A&A 320, 237 - NLTE Model Atmospheres for Extremely Hot Compact Stars
Rauch T., Deetjen J.L., Dreizler S., Werner K. 2000,
in: Highly Energetic Physical Processes and Mechanisms for Emissions from Astrophysical Plasmas, IAU Symposium Vol. 195, eds. P.C.H. Martens and S. Tsuruta, p. 423 - NLTE spectral analysis of the sdOB primary of the eclipsing binary system LB 3459 (AA Dor)
Rauch T. 2000,
A&A 356, 665 - A grid of synthetic ionizing spectra for very hot compact stars from NLTE model atmospheres
Rauch T. 2003,
A&A 403, 709 - Handling of Atomic Data
Rauch T., Deetjen J.L. 2003,
in: Workshop on Stellar Atmosphere Modeling, eds. I. Hubeny, D. Mihalas, K. Werner, The ASP Conference Series Vol. 288 (San Francisco: ASP), p. 103