Classification of exoplanets according to density

Andrzej Odrzywolek, Johann Rafelski
(Submitted on 12 Dec 2016)

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

Comments: Four pages, two figures. Supplement, program and data files included
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:1612.03556 [astro-ph.EP] (or arXiv:1612.03556v1 [astro-ph.EP] for this version)
Submission history
From: Andrzej Odrzywolek
[v1] Mon, 12 Dec 2016 06:49:40 GMT (718kb,D)
https://arxiv.org/abs/1612.03556