STERNEC.S. Jeffery, D. Schönberner, U. Heber, 1974-2002
LTE line-blanketed model atmospheres for hot stars
Plane-parallel line-blanketed model atmospheres for hot stars, Teff>8000K, in local thermal, radiative and hydrostatic equilibrium. Atomic bound-free opacities are treated as in ATLAS, supplemented by additional tables for C, C+, C++, C+++, N, N+, N++, N+++ (Peach 1970). Line opacities are treated using odf's as in ATLAS6. The code handles extremely H-deficient mixtures and composition stratification. A grid of model atmospheres computed using Sterne is available.
InvocationSterne [control [odf [interval [model] ] ] ]
The contents of the file control is described in the reference guide. If control is omitted, information not provided on the command line will be requested by the script. Output files are constructed by appending a label to the string control.
control file containing parameters for required model odf file containing opacity distribution function interval frequency interval for wavelengths: BIG or LIT model file containing starting model
Additional CommandsSterne.input Teff logg nH nHe nC nN grey datfile
Sets up a file datfile containing the required model parameters and which may be used as the input file control.
Sterne.final datfile odf
Takes the output from sterne stored in datfile and computes final model using a LIT interval opacity distribution function odf.
Formats output for use with DIPSO and spectrum.
ExampleSterne.input 20000 4.0 0.9 0.1 0.004 0.006 0 lte2040
Sterne lte2040 dfbp00 BIG
Sterne.final lte2040 dflp00
Sterne.2.5A new version developed by Paul Harrison and Simon Jeffery (St Andrew and Armagh) includes provision for
The OP opacities are still being tested, and the opacity sampling code is still under development.
- new photo-ionization cross-sections from the Opacity Project,
- more extensive line opacities
Sterne.3Another version developed by Paul Harrison (St Andrews and Armagh) includes a more stable and faster temperature correction procedure, and a completely rebuilt internal structure. This is not yet operational.
This page is maintained by:
Simon Jeffery (email@example.com)
Last modified: 02-Jun-2003