摘要：We compare237Lyman-α(Lyα) spectra of the MUSE-Wide survey to a suite of radiative transfer simulations consisting of a central luminous source within a concentric, moving shell of neutral gas, and dust. This six parameter shell-model has been used numerously in previous studies, however, on significantly smaller data-sets. We find that the shell-model can reproduce the observed spectral shape very well – better than the also common “Gaussian-minus-Gaussian” model which we also fitted to the dataset. Specifically, we find that~ 94%of the fits possess a goodness-of-fit value ofp(χ2) > 0.1. The large number of spectra allows us to robustly characterize the shell-model parameter range, and consequently, the spectral shapes typical for realistic spectra. We find that the vast majority of the Lyαspectral shapes require an outflow and only~ 5%are well-fitted through an inflowing shell. In addition, we find~ 46%of the spectra to be consistent with a neutral hydrogen column density< 1017cm-2– suggestive of a non-negligible fraction of continuum leakers in the MUSE-Wide sample. Furthermore, we correlate the spectral against the Lyαhalo properties against each other but do not find any strong correlation.
