Biology
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p14c..02b&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P14C-02
Biology
[5200] Planetary Sciences: Astrobiology, [6200] Planetary Sciences: Solar System Objects, [6297] Planetary Sciences: Solar System Objects / Instruments And Techniques
Scientific paper
Astronomical polarimetric techniques are routinely used to characterize the surface structure of the atmosphere-less bodies of our solar system. Efforts are also dedicated to the study of the features of the atmospheres of Venus and of the giant planets. One of the most exciting subjects of Astronomy is the search and study of exo-solar planets, and in particular the search for extra-terrestrial life. In this kind of research, polarimetric techniques will play a fundamental role, and current polarimetric studies of our solar system represent the obvious reference point for future exo-solar observations. Of special interest are polarimetric observations of the planet Earth, its atmosphere and its surface characteristics (e.g., vegetation, oceans) through astronomical instrumentation. These "home-made" observations will ultimately represent a benchmark for future observations of Earth-like planets of other solar systems. In this talk we will review the polarimetric observations of our solar system, and we will present some of our new spectro-polarimetric observations of terrestrial material, organic and inorganic, obtained with the same astronomical instrumentation used to study the objects of our solar system. We will compare our observational results to models of polarized spectra expected from Earth-like extrasolar planets, and demonstrate the advantages of spectrapolarimetry to probe their atmospheric composition and surface properties.
Bagnulo Stefano
Sterzik Michael
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