Fig. 2
Column density variations in the ground state of the circumstellar Fe I of β Pic. Left panel: temporal variations of the total Fe I0 column density showing a 30 % drop after year 2011. Middle and right panels: sum of the Fe I HARPS fluxes, over the two separate periods, from 2003 to 2011 (solid) and after 2011 (dashed) at the ground state Fe I transition lines wavelengths, 3860 Å (middle panel) and 3824 Å (right panel).
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