An interpretation of the phase background based on observed plasma jetsP. F. Moretti, A. Cacciani, A. Hanslmeier, M. Messerotti, W. Otruba, W. Pötzi and A. WarmuthA&A, 395 1 (2002) 293-296DOI: https://doi.org/10.1051/0004-6361:20021355