Imaging a Binary Star With a Two-Telescope Michelson Stellar Interferometer
1995; Institute of Physics; Volume: 110; Linguagem: Inglês
10.1086/117617
ISSN1538-3881
AutoresH. M. Dyck, J. A. Benson, F. P. Schloerb,
Tópico(s)Astronomy and Astrophysical Research
ResumoUsing a two-telescope Michelson stellar interferometer we observed the well known visual binary star ζ Her. By rapidly driving the optical delay line of the interferometer we were able to obtain temporally distinct interferograms from each component of the binary, preserving the image position information. This observation is presented as an illustration of a technique for imaging with two telescopes which we have named "delay-referenced interferometry." We discuss the implications our measurements for ζ Her and predict resolution limits for other binary systems. With the aid of a simple illustration, we argue that delay referencing is a useful technique for more complex systems when the object is contained entirely within the detector field of view and within the isoplanatic patch. We show how "snapshot" observations at a variety of interferometer orientations may be used in tomographic backprojection of delay-referenced fringes to generate an image of such sources.
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