Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240...54s&link_type=abstract
Binary Stars as Critical Tools & Tests in Contemporary Astrophysics, Proceedings of IAU Symposium #240, held 22-25 August, 2006
Astronomy and Astrophysics
Astrophysics
Scientific paper
Long baseline interferometry in space offers new observational capabilities that are unmatched by other facilities. This paper describes the capabilities of the SIM Planet Quest mission for the study of binary stars, across a broad range of stellar types. Approved key projects include studies of binaries where the companion could be as small as terrestrial planet to potentially supermassive black hole binaries and many common and uncommon objects in between. SIM has several observational capabilities to study binaries. The most obvious is astrometry. But in addition to 1 microarcsecond relative astrometry SIM has the capability to make astrometric measurements in an inertial frame to ˜4 uas. While astrometric accuracy is the main reason for SIM, an interferometer In space one should be capable of very accurate fringe amplitude measurements. For binaries where both objects are luminous and separated by more than a few 10's milliarcsecond SIM can measure both component's position and relative intensities at multiple wavelengths.
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