Free Access

Fig. 3


Phase as a function of the spatial frequency. The different plots are models of a binary system with different flux ratio and angular separation. No noise has been added, so the curves represent the perfect case. From top to bottom, the contrast of the primary to secondary decrease. Panels (a)c)): flux ratio of 1%. Panels (d)f)): flux ratio of 0.1%. Panels (g)-h)-i)): flux ratio of 0.01%. From left to right, the angular separation gets smaller. Panels (a)-d)-g)): 200 mas. Panels (b)-e)-h)): 100 mas. Panels (c)-f)-i)): 50 mas. In the L′ band, the cut-off frequency of an eight meter telescope is 0.01 mas-1.

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.