Christopher Stark Carnegie Institution of Washington Department of Terrestrial Magnetism

1. Searching for Exozodiacal Clouds with Kepler Searching for Signposts with Kepler Christopher Stark Carnegie Institution of Washington Department of Terrestrial Magnetism Collaborators Alan Boss, Alycia Weinberger

2. Resonant Rings in Exozodis Dermott et al. 1994

4. Planet phase = 0°

5. Planet phase = 90°

6. Planet phase = 180°

7. Planet phase = 270°

9. Resonant Rings in Collisional Disks 100 zodis 1 zodi 10 zodis ME ME

10. Resonant Rings in Collisional Disks 100 zodis 1 zodi 10 zodis ME ME

12. Transit Depth

13. Ellipsoidal Star Variations Induced by Hat-P-7b Welsh et al. (2010)

14. The Pipeline-Reduced Kepler Q0 – Q2 Data Counts 0 p/2 p 3p/2 2p Planet phase

15. The Pipeline-Reduced Kepler Q0 – Q2 Data Counts Days

16. Searching the Kepler Q0 – Q3 Data 1.0 Relative Intensity Something < 1 0 p/2 p 3p/2 2p Planet phase

17. 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

18. Our solar system @ 10 pc, viewed with NWO Without dust With our zodiacal cloud Venus Earth Saturn Jupiter Cash et al. (2010) “Emission from exozodiacal dust is likely to be the largest source of astrophysical noise in direct imaging and characterization of exoplanets.” - Exoplanet Community Report (2009)

19.  Eridani β Pictoris Fomalhaut HR 4796A Greaves et al. 1998 Wilner et al. 2011 Kalas et al. 2005 Schneider et al. 2009