So what about Godebert's question? What effect would this have on atmospheric pressure, assuming an Earth-like atmosphere since it's supposed to be habitable.
See #150. The atmosphere just represents a mass. Pressure is force/area, so the fator is 2.0. So, for all things equal, the atmospheric pressure there would be twice Earth's, or 29.4psi.
So what about Godebert's question? What effect would this have on atmospheric pressure, assuming an Earth-like atmosphere since it's supposed to be habitable.
The same amount of atmosphere would be more pressure, however the larger variant is simply how much atmoshpere there is. Take Venus, for example - its gravitational pull is much less than Earth's however its atmosphere is crushing as it simply has more atmosphere. What the increased gavity would do would be to make the habitable range much narrower by elevation than here on Earth, as the atmosphere would be squashed.