H I column densities of H I Components 1 from the Wood et al. (2005) sample. The filled squares indicate targets presenting evidence for an astrosphere and only one H I component, i.e., sight lines completely filled with the Local Cloud, where N/d is supposed to give a real estimate of density. The crossed squares indicate targets where the presence of the astrosphere has been reported but is uncertain. Diagonal lines show lines of constant densities n(H I) = 0.03, 0.04, 0.1 cm^-3.