Figures for "Charged Black Holes in Two-Dimensional String Theory"

Figure 1: Penrose diagram for the Reissner-Nordstrom geometry.	Figure 2: Penrose diagram for the charged open string. The white areas are not part of space-time.

These versions of the figures have been colored to show clearly which regions of the diagram correspond to similar constraints on the parameter y. The asymptotically flat limit (y=0) is a blue line. The black hole singularity at infinite y is a red wiggly line. The green regions border the asymptotically flat limit, and the yellow regions contain the singularity. The orange regions are inside the first (outside) horizon, but outside the second (inner) horizon. In the open-string case, the purple regions are between the two horizons at y₂ and y₃.