Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1158..345t&link_type=abstract
EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP Conference Proceedings, V
Astronomy and Astrophysics
Astronomy
Interferometry, Artificial Earth Satellites, Spectroscopy And Spectrophotometry, Ground-Based Ultraviolet, Optical And Infrared Telescopes
Scientific paper
The ideal way to discover and characterize all exoplanets around nearby stars is to discover the planets with astrometry, then characterize them with direct imaging. To be specific, the Space Interferometer Mission (SIM-Lite) could do the astrometry, and the Terrestrial Planet Finder (TPF) could do the characterization. If TPF is an internal coronagraph it is TPF-C, if an occulter it is TPF-O, or if an interferometer TPF-I. I will discuss the advantage of using SIM-Lite, in combination with radial velocity observations, to detect nearby exoplanets, and to estimate their orbital parameters. SIM Lite will tell us that the planet exists, that it has an estimated mass, and that we can estimate when and where it will re-appear. With this information, a coronagraph can find the planet again, measure its visible spectrum, and characterize it. Additional observations with an interferometer can fill out the full picture. Then, many properties of the planet can be estimated, including a search for signs of life, using the orbit, mass, and visible and infrared spectra.
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