Christopher Stark Carnegie Institution of Washington Department of Terrestrial Magnetism
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Transcript of Christopher Stark Carnegie Institution of Washington Department of Terrestrial Magnetism
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Christopher StarkCarnegie Institution of Washington
Department of Terrestrial Magnetism
Searching for Exozodiacal Clouds with Kepler
CollaboratorsAlan Boss, Alycia Weinberger
Searching for Signposts with Kepler
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Dermott et al. 1994
Resonant Rings in Exozodis
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Planet phase = 0°
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Planet phase = 90°
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Planet phase = 180°
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Planet phase = 270°
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Resonant Rings in Collisional Disks
1 zodi 10 zodis 100 zodis
ME
ME
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1 zodi 10 zodis 100 zodis
Resonant Rings in Collisional Disks
ME
ME
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Tran
sit D
epth
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Ellipsoidal Star Variations Induced by Hat-P-7b
Welsh et al. (2010)
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Planet phase
Coun
ts
The Pipeline-Reduced Kepler Q0 – Q2 Data
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Days
Coun
ts
The Pipeline-Reduced Kepler Q0 – Q2 Data
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Searching the Kepler Q0 – Q3 Data
Planet phase
1.0
Something < 1
Rela
tive
Inte
nsity
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Summary
• Planets can create clumpy resonant ring structures possibly detectable with Kepler
• More Kepler data is needed to confirm a detection
• Non-detection will place upper limit on the degree of asymmetry in exozodiacal clouds
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Our solar system @ 10 pc, viewed with NWO
Without dust With our zodiacal cloud
Earth
JupiterSaturn
Venus
“Emission from exozodiacal dust is likely to be the largest source ofastrophysical noise in direct imaging and characterization of exoplanets.”
- Exoplanet Community Report (2009)
Cash et al. (2010)
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Greaves et al. 1998
Eridani
Schneider et al. 2009
HR 4796A Fomalhaut
Kalas et al. 2005
Wilner et al. 2011
β Pictoris