Science with the Space Interferometry Mission

Details Science with the Space Interferometry Mission Science with the Space Interferometry Mission

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3350..551u&link_type=abstract

Proc. SPIE Vol. 3350, p. 551-560, Astronomical Interferometry, Robert D. Reasenberg; Ed.

Astronomy and Astrophysics

Astrophysics

5

Scientific paper

The Space Interferometry Mission (SIM) will be NASA's first space-based optical interferometer. SIM will produce a wealth of new astronomical data and serve as a technology pathfinder for future astrophysics missions. The SIM architecture uses a 10-m Michelson interferometer in Earth- trailing solar orbit to provide 4 microarcsecond precision absolute position measurements of stars down to 20 magnitude. The corresponding parallax accuracy allows distance measurements to 10 percent accuracy on the far side of the Galaxy. With high-precision proper motions derived during its 5-year lifetime, SIM will address a variety of science questions relating to the formation and dynamics of our Galaxy. Using aperture synthesis, SIM will image in the visible waveband to a resolution of 10 milliarcsec, and will demonstrate interferometric nulling with suppression of the on-axis starlight to a level of 10(superscript -4). In this paper we present selected topics from the SIM science program focusing on some specific astronomical questions to be addressed.

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