Figure 1.
(color online) The classification of the solutions. The horizontal and vertical axes denote ${w_2}$![]()
and ${2M'/r_0}$![]()
, respectively. The blue curve represents ${2M'/r_0 = (1-2w_2)^{-1}}$![]()
, for which ${M=0}$![]()
. Each line in the figure is labeled by the text of the same color.