Fig. 3.

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Three-dimensional overview of the magnetic field structure derived from the various models without (top row) and with the far-side AR (bottom row). The left panels show the PFSS results, the middle panels the WP results and the right panels the WP-AW results. Magnetic field lines are gray when closed, red when open with a positive polarity and blue when open with a negative polarity. The HCS is also shown as a continuous black line around the Sun. We indicate the location of the eastern and western limbs with the letter E and W respectively. We also indicate whether a streamer is a helmet streamer contributing to the HCS (S) or a pseudo-streamer (P; Wang et al. 2007), and we show their number. Arrows point out HCS structures that break apart from the main line.

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