Kepler’s Astounding Haul of Multiple-Planet Systems
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Transcript of Kepler’s Astounding Haul of Multiple-Planet Systems
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Kepler’s Astounding Haul of Multiple-Planet Systems
David LathamHarvard-Smithsonian Center for Astrophysics
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Kepler has found 1,235 planetary candidates:• 827 singles• 408 multiples in 170 planetary systems
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Flatter than our solar system
Can only see multiple transiting planets if all are edge-on
Kepler systems are coplanar to ~1 degree
Deg
rees
deg
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827 Single Planet Systems Detected
Planets smaller than Neptune are more common
Candidates from the first 120 days of Kepler data
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408 candidates in 170 multiple systems
Large planets stir things up, disrupt the flatness.Systems of small planets have more sedate histories
Hot Jupiters are rare in flat systems
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A way to distinguish rocky planets from water worlds
Many systems show gravitational interactions (transit time variations), which can be used to constrain planet masses and bulk densities.
408 candidates in 170 multiple systems