Using temperature to contain an atmosphere?

So, I was looking at the temperature variations in Earth's atmosphere and noticed that it gets extremely cold in some of the upper portions. So I was wondering, could a low gravity world hold onto an atmosphere and have earthlike surface temperatures if there was some kind of handwave particles/super technology/magic that was able to keep the upper part of that planet's atmosphere colder. So this way things like nitrogen and oxygen would lose much of their velocity when moving into the upper atmosphere and will then fall back down into the lower atmosphere. This is all disregarding things like solar wind, etc.

Thanks

posted about 7 years ago

rclev‭

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