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DISEQUILIBRIUM CARBON, OXYGEN, AND NITROGEN CHEMISTRY IN THE ATMOSPHERES OF HD 189733b AND HD 209458b
We have developed a one-dimensional photochemical and thermochemical kinetics and diffusion model to study the effects of disequilibrium chemistry on the atmospheric composition of “hot-Jupiter”… Expand
A physical model of Titan's aerosols.
Microphysical simulations of Titan's stratospheric haze show that aerosol microphysics is linked to organized dynamical processes, and the aerosol's electrical charge is critical for the particle size and optical depth of the haze. Expand
THE 4.5 μm FULL-ORBIT PHASE CURVE OF THE HOT JUPITER HD 209458b
The hot Jupiter HD 209458b is particularly amenable to detailed study as it is among the brightest transiting exoplanet systems currently known (V-mag = 7.65; K-mag = 6.308) and has a large… Expand
Carbon and Oxygen Abundances in Cool Metal-rich Exoplanet Hosts: A Case Study of the C/O Ratio of 55 Cancri
The super-Earth exoplanet 55 Cnc e, the smallest member of a five-planet system, has recently been observed to transit its host star. The radius estimates from transit observations, coupled with… Expand
Titan's surface and troposphere, investigated with ground-based, near-infrared observations.
The authors' observations suggest the existence of an optically thin CH4 cloud layer on Titan, and the most plausible interpretation of the albedos determined at these wavenumbers suggests a surface dominated by "dirty" water ice. Expand
Direct detection of variable tropospheric clouds near Titan's south pole
The discovery of transient clouds near the south pole of Titan demonstrates the existence of condensation and localized moist convection in Titan's atmosphere, and suggests that methane cloud formation is controlled seasonally by small variations in surface temperature. Expand
Evidence for the Exposure of Water Ice on Titan's Surface
A spectrum of Titan's surface within these “windows” was derived and features characteristic of water ice were detected, suggesting that despite the hundreds of meters of organic liquids and solids hypothesized to exist on Titan’s surface, its icy bedrock lies extensively exposed. Expand
Transient clouds in Titan's lower atmosphere
Near-infrared spectroscopic observations of Titan within four narrow spectral windows where the moon's atmosphere is ostensibly transparent detect pronounced flux enhancements that indicate the presence of reflective methane condensation clouds in the troposphere. Expand
WATER, METHANE, AND CARBON DIOXIDE PRESENT IN THE DAYSIDE SPECTRUM OF THE EXOPLANET HD 209458b
Using the NICMOS instrument on the Hubble Space Telescope, we have measured the dayside spectrum of HD 209458b between 1.5 and 2.5 μm. The emergent spectrum is dominated by features due to the… Expand