SIMBAD references

2019ApJ...882L...1F - Astrophys. J., 882, L1-L1 (2019/September-1)

Earth as an exoplanet: a two-dimensional alien map.

FAN S., LI C., LI J.-Z., BARTLETT S., JIANG J.H., NATRAJ V., CRISP D. and YUNG Y.L.

Abstract (from CDS):

Resolving spatially varying exoplanet features from single-point light curves is essential for determining whether Earth-like worlds harbor geological features and/or climate systems that influence habitability. To evaluate the feasibility and requirements of this spatial-feature resolving problem, we present an analysis of multi-wavelength single-point light curves of Earth, where it plays the role of a proxy exoplanet. Here, ∼10,000 Deep Space Climate Observatory/Earth Polychromatic Imaging Camera frames collected over a two-year period were integrated over the Earth's disk to yield a spectrally dependent point source and analyzed using singular value decomposition. We found that, between the two dominant principal components (PCs), the second PC contains surface-related features of the planet, while the first PC mainly includes cloud information. We present the first two-dimensional (2D) surface map of Earth reconstructed from light curve observations without any assumptions of its spectral properties. This study serves as a baseline for reconstructing the surface features of Earth-like exoplanets in the future.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet astronomy - Exoplanet atmospheres - Exoplanet atmospheric variability - Exoplanet detection methods - Exoplanet surface characteristics - Exoplanet surface composition - Exoplanet surface variability - Exoplanets - Extrasolar rocky planets

Simbad objects: 1

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2021.06.14-00:33:41

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