Eccentricity vs dissipation. The thick colored lines corresponds to the minimum, average and maximum eccentricity – bottom full line, middle dashed line and top full line – of 55 Cnc e obtained with the simulations of Dawson & Fabrycky (2010) in purple, and Endl et al. (2012) in blue. The horizontal black dashed line corresponds to the upper limit from observations (e = 0.06, D12). The color bands correspond to the region where the two conditions of Eq. (5) are met: where the tides contribute to more than 10% of the planet’s flux and where the resulting transit depth is between the observational constraints. The light orange band corresponds to an albedo of 0 and the red one to an albedo of 1. The orange dashed dotted lines delimit the band corresponding to an albedo of 0.65.