Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.274..780b&link_type=abstract
Nature, vol. 274, Aug. 24, 1978, p. 780, 781.
Astronomy and Astrophysics
Astronomy
134
Extrasolar Planets, Infrared Astronomy, Infrared Interferometers, Rocket-Borne Instruments, Spaceborne Astronomy, Spin
Scientific paper
A satellite-borne spinning infrared interferometer can detect nonsolar planets because, as the interferometer spins about an axis through the star, the stellar signal will not vary although the planetary signal will vary in a predictable simple way, so that very faint signals can be recovered if they are modulated at a known frequency by synchronous detection that selects that frequency. Alternatively, where the modulation is substantially nonsinusoidal, the received signal can be broken into one-period segments and averaged. The method is applicable in the presence of pointing errors because star and planetary signals will vary in different ways. A way to enhance the planet over the star is to place an interference null on the star. Rocket observations and techniques related to infrared studies are considered.
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