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David K. Sing
Extreme Solar Systems II: Jackson Hole
GTC Transiting Exoplanet Atmospheric Survey: Comparative
Exoplanetology From Narrowband Spectrophotometry
Tuesday, February 7, 2012
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Colleagues and Collaborators Paul A. Wilson Exeter, UKTom Louden
Exeter, UKFrédéric Pont Exeter, UKJean-Michel Désert CfA, USAGilda
Ballester UofA, USAJonathan Fortney UCSC, USAAlain Lecavelier des
Etangs IAP, FranceAlfred Vidal-Madjar IAP, FranceDavid Ehrenreich
LAOG, FranceJordi Cepa IAC, SpainMercedes Lopez-Morales IEEC,
Spain
David K. Sing GTC Atmospheric SurveyTuesday, February 7,
2012
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Large ESO program
The Next Generation Transit Follow-up Project: Exoplanet
Characterization and Detection Through Fast Photometry &
Spectroscopy
Wide Survey of Hot-Jupiter Atmospheres
P.I. - D. Sing
• 11 Hot-Jupiters, 1 super-Earth• Granted 180 hours (2009-2012).
49 Transits (38% complete) • Unique Instrument: Narrowband,
tuneable filter, fast-photometry• Study: Na, K, TiO/VO, Haze, H2
Rayleigh• Comparative exoplanetology
10.4-m GTC
David K. Sing GTC Atmospheric SurveyTuesday, February 7,
2012
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Why Narrowband Photometry?
David K. Sing GTC Atmospheric Survey
TrES-2
Strengths
• Sub-mmag differential photometry • Wide Field• Tune between
sky lines• Good Spectral Resolution• Good data quality
Drawbacks
• Limited λλ coverage• Limited simultaneous λλ coverage
Ideal for Na, K detection 7698Å
Tuesday, February 7, 2012
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Potassium in XO-2b
Sing et al. 2011, A&A, 527, A73
0.067% 12Å
David K. Sing Exoplanet Atmospheres with TransitsTuesday,
February 7, 2012
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Potassium in XO-2b
Sing et al. 2011, A&A, 527, A73
0.067% 12Å
• Hot-Jupiters are Alkali-dominated optical (Na & K)
• Na/K producing low albedos
David K. Sing Exoplanet Atmospheres with TransitsTuesday,
February 7, 2012
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TrES-2b
David K. Sing Exoplanet Atmospheres with Transits
• Possible Potassium• Known very low albedo
(Kipping & Spiegel 2011)
KNa
Tuesday, February 7, 2012
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GJ1214 The world is flat
David K. Sing Exoplanet Atmospheres with Transits
• Much Higher resolution• Still flat• Spots common
Bean et al. (2011; arXiv:1109.0582)
Tuesday, February 7, 2012
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Hat-P-1b
David K. Sing Exoplanet Atmospheres with Transits
• near Photon limited
Tuesday, February 7, 2012
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Hat-P-1b
David K. Sing Exoplanet Atmospheres with Transits
1500 K
KNa
Tuesday, February 7, 2012
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Hat-P-1b Thermosphere??
David K. Sing Exoplanet Atmospheres with Transits
3000 K
KNa
Tuesday, February 7, 2012
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Thermospheres in Hot-Jupiters
David K. Sing Exoplanet Atmospheres with Transits
3000 K
Hat-P-1b ? HD209458b HD189733b
• Thermosphere linked with atmospheric escape• Should be common
• Detectable with Na, K, H line cores
C. Huitson (poster 40.13)
2100 K
Vidal-Madjar et al. (2011)
Escaping Atmo: Vidal-Madjar et al. (2003) - Lecavelier et al.
(2010) Linsky et al. (2010)
Tuesday, February 7, 2012
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Hat-P-1b
David K. Sing Exoplanet Atmospheres with Transits
• Thermosphere result will be checked
• Second GTC potassium transit + Na
• Large HST Programme with STIS
3000 K
Tuesday, February 7, 2012
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Future
2012
Blue Filters (Na)
Longslit Transit Spectra
Completion of Large ESO programme
Hat-P-6b
Tuesday, February 7, 2012
