(a) (b)
Scheme 2. in sub-figure (a) the red curve line corresponds to the H, constructed from the path swept out by the tips of the scaled e2 eigenvectors, shown in mid blue, and is defined by the equation mentioned in section 2.2. In sub-figure (b) the pale blue curve line corresponds to the H*, constructed from the path swept out by the tips of the scaled e1 eigenvectors, shown in magenta, and is defined by the equation mentioned in section 2.2. The mid-blue and magenta arrows representing thee2 ande1 eigenvectors are scaled by the ellipticity ε respectively, where for visualization purposes the vertical scales are magnified. The green sphere shows the position of a given BCP 48.