Different scenarios for the position of the absorbing layer with respect to the protostar and the outflows and influence on the absorbing line depth. In case a), the absorbing layer is less extended than the outflows. The continuum that is absorbed is only due to the protostar. The broad component is superposed. In case b), the absorbing layer is more extended than the outflows. The continuum that is absorbed is due both to the protostar and the outflows.
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