Summary:

We developed a code which drives simultaneously the programs SYNTHE (LTE), MOOG (LTE) and SYNSPEC (NLTE), used to create synthetic spectra. The code could be used to derive different stellar parameters, such as rotational velocity (v sin i), effective temperature, gravity and abundances. All input parameters could be modified simultaneously or fix some of them, and the program will find the best solution. The operation could be performed on a line-by-line basis, or using certain spectral range specified by the user. The code includes algorithms of automatic normalization and radial velocity corrections of the observed spectra.

Results of the code:

The output of the code includes many files, such as an spreadsheet table (csv file) with detailed line-by-line information (log gf, excitation potential, abundance, etc.). For each line, we present a warning if the program detects a possible blend, with the percentage (%) of the contribution.

There are graphical files (EPS, JPG) for the ranges computed showing the best solution, as observed vs synthetic spectra. These graphs optionally include the identification of the most important lines in the spectral range. This helps to decide if the fits are satisfactory or not.

The code also shows (optionally) a graph to check the excitation equilibrium of the Fe lines.

We even include an HTML output, where the user can easily browse the results of the different lines or ranges. An example can be viewed here.