Measurements of binary stars with coherent integration of NPOI data

Details Measurements of binary stars with coherent integration of NPOI data Measurements of binary stars with coherent integration of NPOI data

2008-07-21

arxiv.org/abs/0807.3206v1

Astronomy and Astrophysics

Astrophysics

2008 SPIE Astronomical Telescopes and Instrumentation

Scientific paper

10.1117/12.790290

In this paper we use coherently integrated visibilities (see separate paper in these proceedings, Jorgensen et al. 2008) to measure the properties of binary stars. We use only the phase of the complex visibility and not the amplitude. The reason for this is that amplitudes suffer from the calibration effect (the same for coherent and incoherent averages) and thus effectively provide lower accuracy measurements. We demonstrate that the baseline phase alone can be used to measure the separation, orientation and brightness ratio of a binary star, as a function of wavelength.

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