Spectroastrometry: a new approach to astronomy on small spatial scales

Jeremy A. Bailey

doi:10.1117/12.316802

9 July 1998 Spectroastrometry: a new approach to astronomy on small spatial scales

Jeremy A. Bailey

Proceedings Volume 3355, Optical Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.316802
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

The technique of spectroastrometry (measuring the wavelength dependence of the position of an object) provides a means of studying the spatial structure of astronomical sources on scales much smaller than the seeing disk size or the diffraction limit. Despite successful demonstrations in the past, the method does not seem to be widely known. This paper describes techniques used at the Anglo-Australian Telescope to obtain such observations with standard instrumentation, and presents some examples of astronomical results on sources including binary stars and active galactic nuclei. The potential for combining spectroastrometry with interferometry to observe structure on microarcsecond scales is described.

Citation Download Citation

Jeremy A. Bailey "Spectroastrometry: a new approach to astronomy on small spatial scales", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); https://doi.org/10.1117/12.316802

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