• Publications
  • Influence
Habitable Zones Around Main-Sequence Stars: New Estimates
Identifying terrestrial planets in the habitable zones (HZs) of other stars is one of the primary goals of ongoing radial velocity (RV) and transit exoplanet surveys and proposed future spaceExpand
Ozone concentrations and ultraviolet fluxes on Earth-like planets around other stars.
TLDR
Coupled radiative-convective/photochemical modeling was performed for Earth-like planets orbiting different types of stars and found that advanced life is theoretically possible on high-O(2) planets around F stars, but it is not obvious that it would evolve as it did on Earth. Expand
Biosignatures from Earth-like planets around M dwarfs.
TLDR
Coupled one-dimensional photochemical-climate calculations have been performed for hypothetical Earth-like planets around M dwarfs to determine which biosignature gases might be observed by a future, space-based telescope. Expand
Ground‐based near‐infrared observations of the Venus nightside: The thermal structure and water abundance near the surface
We used ground-based near-infrared (NIR) observations of thermal emission from the Venus nightside to determine the temperature structure and water vapor distribution between the surface and the 6-kmExpand
The Evolution of Solar Flux from 0.1 nm to 160 μm: Quantitative Estimates for Planetary Studies
Understanding changes in the solar flux over geologic time is vital for understanding the evolution of planetary atmospheres because it affects atmospheric escape and chemistry, as well as climate.Expand
Strong water absorption in the dayside emission spectrum of the planet HD 189733b
TLDR
The detection of strong water absorption in a high-signal-to-noise, mid-infrared emission spectrum of the planet itself is reported, finding both a strong downturn in the flux ratio below 10 µm and discrete spectral features that are characteristic of strong absorption by water vapour. Expand
Spectral signatures of photosynthesis. II. Coevolution with other stars and the atmosphere on extrasolar worlds.
TLDR
M star planets could be a half to a tenth as productive as Earth in the visible, but exceed Earth if useful photons extend to 1.1 microm for anoxygenic photosynthesis, and under water, organisms would still be able to survive ultraviolet flares from young M stars and acquire adequate light for growth. Expand
The effect of a strong stellar flare on the atmospheric chemistry of an earth-like planet orbiting an M dwarf.
TLDR
The results indicate that the UV radiation emitted during the flare does not produce a significant change in the ozone column depth of the planet, and flares may not present a direct hazard for life on the surface of an orbiting habitable planet. Expand
ERRATUM: “HABITABLE ZONES AROUND MAIN-SEQUENCE STARS: NEW ESTIMATES” (2013, ApJ, 765, 131)
Identifying terrestrial planets in the habitable zones (HZs) of other stars is one of the primary goals of ongoing radial velocity (RV) and transit exoplanet surveys and proposed future spaceExpand
A Spitzer Spectrum of the Exoplanet HD 189733b
We report on the measurement of the 7.5-14.7 μm spectrum for the transiting extrasolar giant planet HD 189733b using the Infrared Spectrograph on the Spitzer Space Telescope. Although theExpand
...
1
2
3
4
5
...