ZEEMAN.F Files

The compressed tar file zabn-sdss1228-science.tgz contains the
computing programs and data files required to repeat the calculations
discussed in Section 3.2 of the Supporting Online Materia, and in
Figure S5, of a forthcoming article in Science by Christopher Manser et
al entitled "A planetesimal found orbiting within the debris disc
surrounding a white dwarf star". 

In order to use this contents of this file, it is essential to first
learn how the program ZEEMAN.F works generically. On this web site
the compressed tar file zabn4-pkg.tgz contains a base version of the
program together with example files and extensive instructions
explaining to the potential user how to install and compile the required
FORTRAN programs in the progs directory, and how to run appropriate
scripts to model spectral lines with explicit comparison to a region
of an observed spectrum.

Once the general use of ZEEMAN.F is understood, the file
zabn-sdss1228-science tgz should be installed in a suitable location. It
is self-contained, and will operate essentially as the example program
and files operate. The specific version of ZEEMAN.F used for this
problem is in the directory zmwd/progs, along with required auxiliary
programs that may be compiled with the UNIX command make. The requires
stellar atmosphere is in the directory koester. The necessary atomic
line data are in the directory zmwd/linedata. The stellar spectrum and
the specific setup files are in the directory
zmwd/sdss1228-wd-disk/data, where the file modelpars carries the
specific modelling information. The computation is run by the script
z4koe located in the directory scripts. The output will appear in a
file in the directory zmwd/sdss1228-wd-disk/, where several example
output files are already found, covering the cases reported in Figure
S5.