Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985stoc.iafcr....t&link_type=abstract
IAF, International Astronautical Congress, 36th, Stockholm, Sweden, Oct. 7-12, 1985. 23 p.
Astronomy and Astrophysics
Astronomy
Astrometry, Extrasolar Planets, Planetary Systems, Planetology, Astronomical Photometry, Astronomical Spectroscopy, Error Analysis, Spaceborne Astronomy
Scientific paper
Four approaches exist for the detection of extrasolar planets. According to the only direct method, the planet is imaged at some wavelength in a manner which makes it possible to differentiate its own feeble luminosity (internal energy source plus reflected starlight) from that of the nearby host star. The three indirect methods involve the detection of a planetary mass companion on the basis of the observable effects it has on the host star. A search is conducted regarding the occurrence of regular, periodic changes in the stellar spatial motion (astrometric method) or the velocity of stellar emission line spectra (spectroscopic method) or in the apparent total stellar luminosity (photometric method). Details regarding the approaches employed for implementing the considered methods are discussed.
Billingham John
Black David C.
Tarter Jill C.
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