Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2K073

Earth as an exoplanet: Earth’s transit spectrum from the ultraviolet to the near-infrared.

Betremieux, Yan (MPIA)
Kaltenegger, Lisa (MPIA, CfA)

We present the transit spectrum of Earth seen as an exoplanet in primary eclipse from 115 to 1000 nm, and the detectable features, including biosignatures. The effective observable planetary radius for Earth increases by 14 to 180 km, about 3% of the Earth’s radius, towards the shorter wavelengths. Our model shows the individual chemical as well as scattering components that contribute to the spectrum and present a view of Earth as a transiting exoplanet in the UV-NIR spectral region to guide instrument studies for future mission concepts.

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