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The Vegetation Red Edge Biosignature Through Time on Earth and Exoplanets
Jack T. O'Malley-James, Lisa Kaltenegger
The high reflection of land vegetation in the near-infrared, the vegetation red edge (VRE), is often cited as a spectral biosignature for surface vegetation on exoplanets. The VRE…
The Origins Space Telescope
Cara Battersby, Lee Armus, Edwin Bergin +36
The Origins Space Telescope, one of four large Mission Concept studies sponsored by NASA for review in the 2020 US Astrophysics Decadal Survey, will open unprecedented discovery sp…
3D Simulations of Planet Trapping at Disc-Cavity Boundaries
M. M. Romanova, P. S. Lii, A. V. Koldoba +4
Inward migration of low-mass planets and embryos of giant planets can be stopped at the disc-cavity boundaries due to co-orbital corotation torque. We performed the first global th…
A Catalog of Spectra, Albedos, and Colors of Solar System Bodies for Exoplanet Comparison
J. H. Madden, Lisa Kaltenegger
We present a catalog of spectra and geometric albedos, representative of the different types of Solar System bodies, from 0.45 to 2.5 microns. We analyzed published calibrated, un-…
UV Surface Environments and Atmospheres of Earth-like Planets Orbiting White Dwarfs
Thea Kozakis, Lisa Kaltenegger, D. W. Hoard
An Earth-like exoplanet orbiting a white dwarf would be exposed to different UV environments than Earth, influencing both its atmospheric photochemistry and UV surface environment.…
A Methane Extension to the Classical Habitable Zone
Ramses M. Ramirez, Lisa Kaltenegger
The habitable zone (HZ) is the circumstellar region where standing bodies of liquid water could exist on the surface of a rocky planet. Conventional definitions assume that CO2 and…