Evolution strategies applied to the problem of line profile decomposition in QSO spectra

Details Evolution strategies applied to the problem of line profile decomposition in QSO spectra Evolution strategies applied to the problem of line profile decomposition in QSO spectra

2004-10-15

arxiv.org/abs/astro-ph/0410391v2

Astronomy and Astrophysics

Astrophysics

9 pages, 5 figures, accepted for publication in Astron. Astrophys., corrected figure misplacements, full resolution manuscript

Scientific paper

10.1051/0004-6361:20041601

We describe the decomposition of QSO absorption line ensembles applying an evolutionary forward modelling technique. The modelling is optimized using an evolution strategy (ES) based on a novel concept of completely derandomized self-adaption. The algorithm is described in detail. Its global optimization performance in decomposing a series of simulated test spectra is compared to that of classical deterministic algorithms. Our comparison demonstrates that the ES is a highly competitive algorithm capable to calculate the optimal decomposition without requiring any particular initialization.

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