A Technique for Photometric Detection and Measurement of Unresolved Binary Systems | Zendy

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A Technique for Photometric Detection and Measurement of Unresolved Binary Systems

Author(s) -

Paul Hickson

Publication year - 1998

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/316128

Subject(s) - binary number , physics , point spread function , carbon star , moment of inertia , astrophysics , binary star , star (game theory) , optics , mathematics , stars , classical mechanics , arithmetic

A technique is described for the detection and measurement of close binarysystems whose images are unresolved. The method is based on analysis of themoment of inertia tensor of the image, from which the product of the binaryflux ratio and square of the angular separation may be determined. Intrinsicasymmetries of the point-spread function are removed by comparison with theimage of a reference star. Multiple exposures may be used to increase thesignal-to-noise ratio without need of image alignment. An example is given of asimulated measurement of the dwarf carbon star system G77-61.Comment: PASP, in press. 17 pages including 2 figure

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