Testing Bimodal Planet Formation

Details Testing Bimodal Planet Formation Testing Bimodal Planet Formation

2003-12-11

arxiv.org/abs/astro-ph/0312313v2

Astronomy and Astrophysics

Astrophysics

submitted to ApJ Letters, 2 pages using emulateApJ

Scientific paper

We suggest that the observed break in giant-planet frequency as a function of host metallicity at Z=0.02 may be a reflection of bimodal planet formation. We search for signatures of this bimodality in the distributions of the planet eccentricities, periods, masses, and multiplicity. However, the low-metallicity sample is at present too small to test for any but the most severe differences in these two putative populations.

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