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Dive into the evolving synthesis of planetary science and astronomy theories focusing on the modeling of extrasolar giant planets (EGPs). Discover the theories behind the evolution, spectra, and colors of substellar-mass objects and detailed atmospheric chemistry, as well as predictions supporting ground-based and space-based direct detection programs. Explore the remote sensing techniques and scientific themes of physics, atmospheres, chemistry, structure, spectra, composition, clouds, evolution, and general properties of EGPs. Delve into the orbital properties of EGPs, the complex behaviors of cloud models, and the intricate albedo variations influenced by metallicity among other factors.
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Extrasolar Giant Planet Theory and Atmospheres An Emerging Synthesis of Planetary Science and Astronomy
Theory Programfor Modeling EGPs • Evolution, Spectra, and Colors of isolated and irradiated substellar-mass objects (SMOs) and planetary structure studies • Theory of T and L dwarfs • Atmospheric Chemistry and Abundances: Molecules and atoms • Reflection Spectra and Albedos of EGPs • Cloud modeling (silicates, Fe, H2O, NH3) • Transit, eclipse, and secondary eclipse studies • Evolution of Jupiter and Saturn • Opacity and molecular spectrum calculations (Quantum chemistry) • Ab-initio calculations for Na-D, K I, FeH, CrH, TiH … • Predictions in support of ground-based and space-based programs of direct extrasolar planet detection • Radiative transfer techniques • (Collaborators: Burrows, Hubbard, Hubeny, Sudarsky, Sharp, Milsom, Lunine, Li, Fortney, Cooper, Volobuyev)
The Evolution and Measurement of EGPs: Remote Sensing of Extrasolar Planets
Theory of EGPs • Scientific Themes: Physics, Atmospheres, Chemistry, Structure, Spectra, Composition, Clouds, Evolution, Remote Sensing • General EGP properties • Transit Theory • Irradiated EGPs and Direct Detection
Orbits from 0.02 AU to ~5 AU Orbital eccentricities can be very high (0 to ~0.8) Periods from 1.2 days Masses from below Saturn’s mass to >10 MJ Many multi-EGP systems 4 “Neptunes” discovered 7 transiting EGPs Secondary eclipses seen in two Correlation with metallicity Found around M, K, G, and F stars Stellar irradiation effects (on spectra and radii) Migration in protostellar disks in first millions of years Planetary Winds and mass loss (evaporation?) Jet Streams and Day/night contrasts for close-in EGPs Complicated Albedo behavior with orbital distance Planetary Phases and extreme light curves Ammonia, Water, and silicate clouds (variation during orbit!) General circulation models (GCMs) needed Extrasolar Giant Planet Exotica
51 Peg b, 1995: R vs. M vs. composition (H, He, H2O, silicates …) Zapolsky and Salpeter 1969 Guillot, Burrows et al. 1996
1.0 Mj Tidal Hayashi Forbidden Zone 51 Peg b Olivine
Transit by HD209458b Charbonneau, Brown et al. 2001, 2002, 2003
HD209458b OGLE-TR-56b Burrows et al. 2004
HD209458b: Na detection: Charbonneau et al. 2003
Lyman Alpha: Vidal-Madjar et al. 2003; 15%! ~4.3 Rj: Planetary Wind! 15% dip! cf. Burrows & Lunine (1995)
Irradiated EGPs vs. Angular Separation Burrows 2005; Sudarsky, Burrows, and Hubeny 2003
Burrows, Hubeny, & Sudarsky 2005, Ap.J. Letters, in press. Secondary Eclipses of Transiting EGPs Data: Deming et al. 2005; Charbonneau et al. 2005
Precision Radial Velocity Precision photometry ? Transit searches (many) Interferometry (LBT, VLTI, Keck, PTI): Imaging (Fizeau) and Astrometry (Michelson) Extreme Adaptive Optics Microlensing Spectral Separation Differential imaging Antarctica (30-m, 100-m?) HST astrometry ? NICMOS upgrade ? Spitzer (IRAC, IRS, MIPS) JWST (MIRI, NIRCam) SIM/GAIA Eclipse (coronagraph)? Kepler/COROT MOST, MONS TPF-C; TPF-I/Darwin Planet Finder/Life Finder Future of Direct Detection of Extrasolar Planets From the Ground: From Space:
Planet/Star Contrast: Theory (dashed) versus Capability Red: H band (1.6 microns); Purple: Mid-IR;Green: Optical
2020 2004 2008 2016 2000 2012 Schedule (M.Perryman) COROT Kepler Gaia Amex SIM TPF/Darwin precursor? TPF/Darwin Very large telescopes (GMT,TMT,OWL) Very large space arrays
Second Generation Visions First Generation NASA’s Origins development (as summarized by M. Perryman)