Exoplanets as blue as Neptune

Details Exoplanets as blue as Neptune Exoplanets as blue as Neptune

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p11f1634b&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P11F-1634

Biology

[0343] Atmospheric Composition And Structure / Planetary Atmospheres, [5210] Planetary Sciences: Astrobiology / Planetary Atmospheres, Clouds, And Hazes

Scientific paper

Polarimetry is a powerful technique for detecting directly exoplanetary atmospheres and exploring its geometry, chemistry, and thermodynamics. In addition, observed polarization variability exhibits the orbital period of the planet and reveal the inclination, eccentricity, and orientation of the orbit. Recently, we have started a polarimetric survey of nearby planetary systems with hot Jupiters closely orbiting their host stars. Here we will demonstrate how polarized scattered light reveals the presence of exoplanets in unresolved planetary systems and provides direct probes of their atmospheres. We identify a small group of inflated and highly reflective hot Jupiters, with albedo defined by Rayleigh scattering on, most probably, condensates in high altitude haze or clouds. The scattering results in the blue shine of these planets similar to Neptune.

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