We summarize the differential phase (DP) technique as well as the planned implementation at the Keck interferometer. Multicolor phase measurements are potentially a powerful astrophysical probe - and can allow ground-based direct detection of extrasolar planets. Better than 0.1 mrad phase measurements in the infrared can allow the Keck interferometer to detect radiation from the so-called hot-Jupiter or "roaster" class of planets. At JPL, we are presently developing and testing instrumentation that enable these extremely sensitive measurements. First on-sky observations are expected to start in mid-2004. In this article we describe DP and other related techniques, provide an outline of the instrument and present results from preliminary laboratory experiments.
Differential phase interferometry with the Keck telescopes
2004 IEEE Aerospace Conference Proceedings (IEEE Cat. No.04TH8720) ; 3 ; 2128 Vol.3
2004-01-01
526988 byte
Conference paper
Electronic Resource
English
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