Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21010601c&link_type=abstract
American Astronomical Society Meeting 210, #106.01; Bulletin of the American Astronomical Society, Vol. 39, p.231
Astronomy and Astrophysics
Astronomy
Scientific paper
When exoplanets are observed to transit their parent stars, we are granted unprecedented access to their physical properties. It is only for these systems that we are permitted direct estimates of the planetary masses and radii, which in turn provide fundamental constraints on models of their physical structure. Furthermore, such planets afford the opportunity to study their atmospheres without the need to spatially isolate the light from the planet from that of the star. Several satellite missions (most notably the Spitzer Space telescope) have delivered a host of detections, including emergent and transmission spectra, broad band photometry, and brightness variations with orbital phase, as well as strong upper limits on the visible light albedos. We are now in a position to make informed statements about the plethora of theoretical models of these strongly irradiated atmospheres, and to unite planetary scientists and astronomers in the study of these fascinating objects. I will also look ahead to how the same techniques may permit a study of the atmospheres of terrestrial planets in the habitable zones of low-mass stars.
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