Interferometric Orbit Of The Self-calibrating System η Orionis Using The Chara Array

Details Interferometric Orbit Of The Self-calibrating System η Orionis Using The Chara Array Interferometric Orbit Of The Self-calibrating System η Orionis Using The Chara Array

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...211.5722o&link_type=abstract

American Astronomical Society, AAS Meeting #211, #57.22

Astronomy and Astrophysics

Astronomy

Scientific paper

An interferometric orbit for the self-calibrating multiple star system η Orionis has been calculated using data taken from the CHARA Array. The self-calibration method requires two nearby stellar systems, such that two fringe packets are observed when such systems are observed with the CHARA Array. The multiple system η Orionis is an ideal prototype for this type of observation, as it is a hierarchical quadruple system that involves a close binary and a wide component that will produce two fringe packets, one for the close binary and one for the wide component, on certain baselines of the CHARA Array. The visibilities of the wide component can then be used to calibrate visibility measurements of the close binary, η Orionis Aab. This technique of observing a calibrator at the same time as its target should correct for some of the atmospheric and instrumental effects associated with the "bracketed" method of observation, in which the interferometer slews back and forth between target and calibrator several times. The parameters of the calculated orbit of η Orionis Aab are presented here. Research at the CHARA Array is supported by the College of Arts and Sciences at Georgia State University and by the National Science Foundation through NSF Grant AST 0606958.

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