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Spatially Resolving Spectroscopic Binaries with the CHARA Array: The SFP Project

Published online by Cambridge University Press:  25 February 2014

C.D. Farrington  and
T.A. ten Brummelaar
C.D. Farrington
Affiliation:
The CHARA Array, Mt. Wilson Observatory, Mt. Wilson, CA 91023, USA
T.A. ten Brummelaar
Affiliation:
The CHARA Array, Mt. Wilson Observatory, Mt. Wilson, CA 91023, USA
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Abstract

When observed with optical long-baseline interferometers (OLBI), components of a binary star which are sufficiently separated such that their interferometric fringe packets do not overlap are referred to as Separated Fringe Packet (SFP) binaries. These SFP binaries extend out into the regime of systems resolvable by speckle interferometry at single, large-aperture telescopes and can provide additional measurements for preliminary orbits lacking good phase coverage, help constrain elements of already established orbits, and locate new binaries in the undersampled regime between the bounds of spectroscopic surveys and speckle interferometry. In this process, a visibility calibration star is not needed, and the separated fringe packets can provide an accurate vector separation. Presented here we describe the method, usage, and modified orbits for several systems used to validate the procedure.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 64: Setting a New Standard in the Analysis of Binary Stars , 2013 , pp. 205 - 208
Copyright
© EAS, EDP Sciences, 2014

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