Left: magnetic field Bnetwork around the average supergranule near disk center as a function of azimuthal angle ψ. To obtain Bnetwork, the magnetic field B was averaged over segments (width 10° in ψ) of a concentric ring around the center of the average supergranule. The inner and outer limits of the ring are 11 and 18 Mm (circles in Fig. 2). The thin blue lines give the 1σ bounds. The dashed line is a least-squares fit to a cosine of the form specified by Eq. (1). The maximum of the cosine is fixed at ψ = 0° (west direction). For comparison, the horizontal black line shows the background field Gauss. Right: as for the left, but for f-mode mean travel times. In addition to the result at disk center, the mean travel times at other positions along the equator are shown (using patches centered at longitudes ± 20°, ± 40°, and ± 60° away from the central meridian, averaged over east and west). The dashed line represents the cosine function given by Eq. (2). By construction, the mean travel time in the background is zero.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.