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Previous studies of the source regions of solar wind sampled by ACE and Ulysses showed that some solar wind originates from open flux areas in active regions. These sources were labeled active region sources when there was no corresponding coronal hole in the He 10830 Å synoptic maps. Here, we present results on an investigation of the magnetic topology of these active region sources and a search for corresponding features in EUV and soft X-ray images. In most, but not all, cases, a dark holedoi:10.1063/1.1618539 fatcat:4hx4sowgn5hjbkdsllhbrvc6v4