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Exoplanetary Scratchpad

[SysBP Img]

A star with two planets that get extremely close to each other. The inner planet b is a rocky super Earth at 0.115 AU, while the outer c is a mini Neptunian at 0.128 AU. C gets close enough to b that it can appear twice as large as the full moon. Their gravitational effects are large, causing large transit timing variations. They are in near 7:6 resonance. They approach each other every 97 days. The tidal effects are much greater than the Moon's on Earth, and might trigger volcanism. One question is if they formed on opposite sides of the snow line and how they might have drifted so close together. The pair have the largest density contrast of any measured system, with b being a rocky planet 8 times as dense as c. It's iron core likely has 30 percent of its mass, surrounded an atmosphere of % water and no more than 15% water. C may also have a rocky core, but surrounded by a much larger atmosphere of Hydrogen and Helium.

Kepler-36 System Web Pages[]

Kepler-36 System In the News[]

Two Planets in Proximity Found (2012)[]

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