Figure 3 : Population of emitters in the Milky Way.

From: Signal coverage approach to the detection probability of hypothetical extraterrestrial emitters in the Milky Way

Figure 3

Calculated number N of emitters in the galaxy as a function of the observable radius for different detection probabilities ϕ. Each pair of solid and dashed lines represents N for the values of ϕ indicated in the figure. The solid and dashed lines have the same meaning as in Fig. 2.