Habitability of brown dwarf systems

The habitability of brown dwarf planets is considered less plausible than for main-sequence stars, due to the cooling central dwarf and tidal forces due to super close-in HZ, but more plausible than for white dwarfs due to the lesser XUV and X-ray output. The planet would have to have an extremely low orbital eccentricity (ranging from Earth-like to ten-millionths depending on semimajor axis and brown dwarf mass) to avoid a tidal runaway greenhouse effect, and a planet's water and atmosphere may not survive the early stage when the planet is interior to the HZ.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.