9. Transit & eclipse of HD189733b Heather Knutson & Dave Charbonneau (2007)
10. What can we learn from transiting extrasolar planets HD 209458b: Dimming of light due to transit, observed with HST. Brown, Charbonneau, Gilliland, Noyes, Burrows (2001) Tells us DIRECTLY: Planet radius, INDIRECTLY: Planet density Planet composition
14. Model: Seager & Sasselov 2000 Detection: Charbonneau et al 2002
15. A study of an extrasolar planet Spitzer Telescope data: Heather Knutson, Charbonneau et al. (2007)
16. Direct Detection of Thermal Emission Infrared Eclipses of Hot Jupiters: Spitzer Space Telescope
17. New 2 m Spectrum for HD 189733b (Swain et al. 2008)
18. NASA Kepler mission: transit search for planets Cygnus / Lyra (RA=19h23m, Dec=44.5d)
19. KEPLER: Search for Earth Twins GOAL: to discover ~30 Earths and ~300 super-Earths in habitable zones; NASA Mission - launch in 2009 Transit Search: ~150,000 stars Can detect planets like our Earth
21. Kepler is ready to launch: Mar. 5, 2009 Assembly at Ball Aerospace Kepler expected yields: ~ 300 super-Earths, ~ 30 Earth analogs; (5-10% good radii)
22. Kepler is ready to launch: Mar. 5, 2009 Assembly at Ball Aerospace Kepler expected yields: ~ 300 super-Earths, ~ 30 Earth analogs; (5-10% good radii)
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24. Summer 07 : Ti:sapphire femtosecond laser comb Fall 2007 : characterize with astro spectrograph 2008 : develop high-rep rate comb for astro applications and demo on mountain-top 2009 : Optimized system for 1 cm/s Doppler shift precision Harvard/Smithsonian/MIT astro-comb project Li et al. (2008, Nature, Apr.)
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26. Super-Earths geochemistry, e.g. the Carbonate-silicate cycle, or Sulfur cycle, etc. Planets of different initial conditions are “driven” to a set of geochemical equilibria by global geo-cycles over geological timescales. e.g., Halevy & Schrag (2008)
How do we discover planets orbiting other stars? Direct detection still does not work. The most successful methods are indirect - Doppler shift wobble of the star due to the gravitational pull of the planet(s) and the transit method.
Here is the full light curve of hot Jupiter HD189733b showing both the transit and the secondary eclipse (in infrared light). The wavelike change between transit and eclipse is due to changing thermal emission from the planet - allowing to map its surface. Spitzer 8 micron observations.
Just to remind you, that this transiting planet was first discovered by the standard spectroscopic “wobble” technique, and only afterwards were transits detected.
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Here is the full light curve of hot Jupiter HD189733b showing both the transit and the secondary eclipse (in infrared light). The wavelike change between transit and eclipse is due to changing thermal emission from the planet - allowing to map its surface. Spitzer 8 micron observations.
