Classification of exoplanets according to density
Abstract
Considering probability distribution as a function of the average density computed for 424 extrasolar planets we identify three log-normal Gaussian population components. The two most populous components at 0.7 g/cc and 7 g/cc are the ice/gas giants and iron/rock super-Earths, respectively. A third component at 30 g/cc is consistent with brown dwarfs, i.e., electron degeneracy supported objects. We note presence of several extreme density planetary objects.
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