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Self-phase-referencing interferometry with SUSI

Date

2012

Authors

Kok, Y
Tuthill, Peter G
Robertson, James G
Warrington, B A
Tango, W J
Ireland, Michael

Journal Title

Journal ISSN

Volume Title

Publisher

SPIE - The International Society for Optical Engineering

Abstract

The Sydney University Stellar Interferometer (SUSI) is being fitted with a new beam combiner, called the Micro-arcsecond University of Sydney Companion Astrometry instrument (MUSCA), for the purpose of high precision astrometry of bright binary stars. Operating in the visible wavelength regime where photon-counting and post-processing fringe tracking is possible, MUSCA will be used in tandem with SUSI's primary beam combiner, Precision Astronomical Visible Observations (PAVO), to record high spatial resolution fringes and thereby measure the separation of fringe packets of binary stars. With continued monitoring of stellar separation vectors at precisions in the tens of micro-arcseconds over timescales of years, it will be possible to search for the presence of gravitational perturbations in the orbital motion such as those expected from planetary mass objects in the system. This paper describes the first phase of the development, which includes the setup of the dual beam combiner system and the methodology applied to stabilize fringes of a star by means of self-phase-referencing.

Description

Keywords

Keywords: At precision; Beam combiner; Binary star; Dual beam; Fringe packet; Fringe tracking; Gravitational perturbations; High precision; High spatial resolution; Instrumentation: interferometers; Micro-arcsecond; Optical interferometry; Orbital motions; Photon c Instrumentation: interferometers; Optical interferometry; Techniques: interferometric

Citation

Source

Proceedings of SPIE - The International Society for Optical Engineering

Type

Conference paper

Book Title

Entity type

Access Statement

License Rights

DOI

10.1117/12.925238

Restricted until

2037-12-31