Direct detection of extra-solar planetary systems from balloon borne telescopes

Details Direct detection of extra-solar planetary systems from balloon borne telescopes Direct detection of extra-solar planetary systems from balloon borne telescopes

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..359t&link_type=abstract

Conference Paper, Astronomical and Biochemical Origins and the Search for Life in the Universe, IAU Colloquium 161, Publisher: B

Computer Science

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Extrasolar Planets, Planetary Systems, Balloon Sounding, Spaceborne Telescopes, Planetary Atmospheres, Jupiter (Planet), Balloon-Borne Instruments, High Altitude Balloons, Earth (Planet), Stellar Systems

Scientific paper

Analysis of a 1.5-m diameter High Altitude Balloon Circumstellar Imaging Telescope (HABCIT) indicates that it offers a fast and low cost path to direct detection of extrasolar planets. Above an altitude of about 30 km, scatter in the visible due to the atmosphere is more than 1000 times smaller than the diffraction sidelobes for a 1.5-m telescope at 1 arcsec in the visible. This permits a thousandfold reduction in the total background against which the planet must be detected. By flying a scatter-compensated 1.5-m telescope and high efficiency coronagraph on a balloon platform, a very near-term and low-cost opportunity exists to achieve exciting scientific results and technology demonstrations. For a thousandfold reduction in the background, a Jupiter-like planet could be detected around more than 70 stars with an average integration time of 16 h. For the very nearest stars, complete planetary systems can be characterized down to nearly Earth sized planets over a range of orbital distances (1-5 AU).

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