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4 votes

Life around a former brown dwarf

The scenario is that the new life zone due to the star's increasing luminosity expands past the brown dwarf, making its moons lie in the life zone. The big issue here is the time span they are in the ...
Anders Sandberg's user avatar
2 votes

Sub brown dwarf cores

The most prevalent idea for the formation of gas giant planets is the "core accretion model". This proposes that the massive gas envelope accumulates around a core of icy or even rocky ...
ProfRob's user avatar
  • 153k
1 vote
Accepted

How would we tell the difference between low mass objects that formed by direct collapse or in an accretion disk?

I think this is almost impossible for an individual object and in fact there may be almost no structural difference at all. Objects formed in a disk may form via "core accretion" around a ...
ProfRob's user avatar
  • 153k
1 vote

How would we tell the difference between low mass objects that formed by direct collapse or in an accretion disk?

For objects larger than roughly Jupiter that is very hard to impossible to do: their mass, density, size and atmospheric composition is (nearly) identical for both scenarios. Even though the overall ...
planetmaker's user avatar
  • 19.6k

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