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A stellar spectral synthesis program

Version : 2.43
Author(s) : Richard O. Gray, Appalachian State University (
License : Free
Website :

Disk space required for installation is 6.75 Mb


SPECTRUM ((C) Richard O. Gray, 1992,3,4,5) is a stellar spectral synthesis program. SPECTRUM computes the LTE synthetic spectrum given a stellar atmosphere model.
SPECTRUM uses as input the new, fully blanketed stellar atmosphere models of Robert Kurucz (1991), but any other stellar atmosphere models which can be cast into the format of
Kurucz's models can be used as well.

SPECTRUM can be programmed with "command-line switches" to give a number of different outputs. In the default mode, SPECTRUM computes the stellar- disk-integrated
normalized-intensity spectrum, but in addition, SPECTRUM will compute the absolute monochromatic flux from the stellar atmosphere or the specific intensity from any point on the
stellar surface.

SPECTRUM and a number of auxiliary programs can be run under batch mode, making automated computation of a large number of synthetic spectra possible.

SPECTRUM is distributed with an atomic and molecular line list for the optical spectral region 3000 A to 6800 A, called luke.lst suitable for computing synthetic spectra with
temperatures between about 4500K and 20,000K.

SPECTRUM currently supports most atomic elements important in stellar spectra and their first or second ions. SPECTRUM also supports the following diatomic molecules: CH, NH,
OH, MgH, SiH, CaH, SiO, C2, CN, CO and TiO. Other molecules and atoms will be added in the future.

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