Thanks for spotting that link. Digging one link farther reveals the original article [2] which is more detailed and descriptive than the others. The original a

Thanks for spotting that link. Digging one link farther reveals the original article [2] which is more detailed and descriptive than the others. The original article explores super-Earths where the primordial H–He atmosphere is retained and traps enough heat to sustain liquid water, and includes simulations of “unbound” super-Earths that are ejected from their star systems. The mathematical model [3] incorporates the initial heat from planet formation and radiogenic heat but does not mention tidal forces. [2]: https://www.nature.com/articles/s41550-022-01699-8 https://www.nature.com/articles/s41550-022-01699-8 [3]: https://github.com/mollous/Data_Liquid_Water_Conditions https://github.com/mollous/Data_Liquid_Water_Conditions --- The original article also includes this discussion of habitability: Life on the type of planet described in this work would live under considerably different conditions than most life on Earth. The surface pressures in our results are on the order of 100–1,000bar, the pressure range of oceanic floors and trenches. There is no theoretical pressure limit on life, and some of the most extreme examples in Earth’s biosphere thrive at ~500bar. These habitats also receive a negligible amount of direct sunlight, and therefore photosynthesis would not be an optional mechanism to provide for metabolism. Chemoautotrophic life on Earth would be a more likely analogue to possible life on this type of planet.