EPIC211351816.01: The First Known Re-Inflated Planet(?)

Presented at Morning Tea at the University of Sydney, Sydney, Australia.

Transcript

1. EPIC 211351816.01: THE FIRST RE-INFLATED PLANET(?) SAM GRUNBLATT, UNIVERSITY OF HAWAII DAN HUBER2, ERIC GAIDOS1, ERIC LOPEZ3, BJ FULTON1, ANDREW VANDERBURG4, TOM BARCLAY5, JONATHAN FORTNEY6, ANDREW HOWARD7, HOWARD ISAACSON8, ANDREW MANN9, ERIK PETIGURA7, VICTOR SILVA AGUIRRE10, EVAN SINUKOFF1 1. UNIVERSITY OF HAWAII, 2. UNIVERSITY OF SYDNEY, 3. UNIVERSITY OF EDINBURGH, 4. HARVARD UNIVERSITY, 5. NASA AMES, 6. UNIVERSITY OF CALIFORNIA, SANTA CRUZ, 7. CALIFORNIA INSTITUTE OF TECHNOLOGY, 8. UNIVERSITY OF CALIFORNIA, BERKELEY, 9. UNIVERSITY OF TEXAS, AUSTIN, 10. AARHUS UNIVERSITY Image credit: C. Carreau / ESA
2. My experience: RV analysis Stellar activity: 10-30 m/s Planetary signal: ~1.5 m/s
3. My experience: helioseismology
4. Looking for planets around red giant stars
5. Looking for planets around red giant stars
6. Looking for planets around red giant stars: inflation?
7. Inflated Hot Jupiters are ubiquitous. Lopez & Fortney (2016)
8. Inflated Hot Jupiters are ubiquitous. Lopez & Fortney (2016) maximum expected radius
9. Inflated Hot Jupiters are ubiquitous. Lopez & Fortney (2016) maximum expected radius highly inflated not inflated
10. The Mechanism of Planet Inflation eg. Batygin & Stevenson (2010) Wu & Lithwick (2013) Class I: planet inflated directly by increased stellar irradiation Class II: delayed cooling after planet formation
11. How to distinguish between Classes I and II? Lopez & Fortney (2016) Class I Class II
12. How to distinguish between Classes I and II? Lopez & Fortney (2016) Class I Class II red giant host star
13. K2: Extension to Kepler Mission - ~80 day observing campaigns - community chosen targets: Giants Orbiting Giants target stars observed in Campaigns 4, 5, 6, 7, 8, 10 (Huber 2015)
14. Searching for Planets around Red Giant Stars with K2 D. Huber (2015) Planets K2 can detect
15. Searches for Planets around Red Giant Stars with K2 D. Huber (2015) re-inflation regime
16. Searches for Planets around Red Giant Stars with K2 D. Huber (2015) re-inflation regime EPIC 2113 Grunblatt et al., accepted (arXiv.org/abs/1606.05818)
17. EPIC 211351816 lightcurve transits Grunblatt et al., submitted (arXiv:1606.05818)
18. EPIC 211351816 lightcurve transits ] granulation noise Grunblatt et al., submitted (arXiv:1606.05818)
19. EPIC 211351816 lightcurve Barclay et al. (2015)
20. Gaussian process + transit fit individual transits phased lightcurve Grunblatt et al., submitted (arXiv:1606.05818) before GP fit
21. Gaussian process + transit fit individual transits phased lightcurve after GP fit Grunblatt et al., submitted (arXiv:1606.05818)
22. Asteroseismology Rs = 4.18 +/- 0.2 R⊙ Ms = 1.15 +/- 0.15 M⊙ Rp = 1.29 +/- 0.11 RJ Grunblatt et al., submitted (arXiv:1606.05818)
23. Planet mass determination: radial velocity measurements Mp = 1.10 +/- 0.12 MJ Grunblatt et al., submitted (arXiv:1606.05818)
24. Planet irradiation history average incident flux on main sequence: 170 +140-60 F Grunblatt et al., submitted (arXiv:1606.05818)
25. Planet irradiation history typical incident flux for ~1.3 RJ planets average incident flux on main sequence: 170 +140-60 F Grunblatt et al., submitted (arXiv:1606.05818)
26. Result suggests re-inflation! Inconsistent with no external heating after formation Class II ] Class I Evidence for ~0.2% heating efficiency Grunblatt et al., submitted (arXiv:1606.05818)
27. Energetic outlier on the MS! Currently typical of inflated planets Grunblatt et al., submitted (arXiv:1606.05818)
28. Energetic outlier on the MS! Currently typical of inflated planets Grunblatt et al., submitted (arXiv:1606.05818) but an outlier assuming MS flux.
29. Summary The first planet found orbiting an oscillating star with K2: 1.3 RJ, 1.1 MJ, 8.4 day period Suggests planet inflation during RGB phase: irradiation on main sequence could not inflate planet to current size. EPIC 211351816.01: The First Re-Inflated* Planet *probably. Grunblatt et al., submitted (arXiv:1606.05818)
30. Future Work: Red Giant Planet Occurrence EPIC 2113 ? ? ? ? ? ? Expected yield: 20 +/- 10 planets.