HZ limits for different planetary masses. The inner HZ for Earth (green curve) is scaled with the Leconte et al. (2013) inner HZ for the Sun, using our runaway greenhouse limit. The outer HZ is the maximum greenhouse limit. The tidal locking radius (black dot), assuming a 4.5 Gyr tidal locking timescale, separates rapidly rotating planets with tidally locked ones. The inner-edge limits for tidal-locked planets around cool stars from Yang et al. (2013) are also shown (colored squares).