Imaging stellar multiplicity with the NPOI

Donald J. Hutter; James A. Benson; Robert T. Zavala; Kenneth J. Johnston; Thomas A. Pauls; Christian A. Hummel; J. Thomas Armstrong

doi:10.1117/12.549955

20 October 2004 Imaging stellar multiplicity with the NPOI

Donald J. Hutter, James A. Benson, Robert T. Zavala, Kenneth J. Johnston, Thomas A. Pauls, Christian A. Hummel, J. Thomas Armstrong

Author Affiliations +

Proceedings Volume 5491, New Frontiers in Stellar Interferometry; (2004) https://doi.org/10.1117/12.549955
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

We present preliminary results from an ongoing survey for multiplicity among the bright stars using the Navy Prototype Optical Interferometer (NPOI). While the NPOI has previously concentrated on producing "visual" orbits of known close speckle and spectroscopic binaries, we have now embarked on a broader survey to detect new binary/multiple systems. We first present a summary of previous NPOI observations of known binary and multiple systems to illustrate the instrument's detection sensitivity for binaries at large magnitude differences over the range of angular separation detectable by the NPOI (currently 3 - 300 mas). We then discuss early results of the survey of bright stars north of declination -20°. This survey, which compliments previous surveys of the bright stars by speckle interferometry, initially emphasizes stars in a proposed Terrestrial Planet Finder (TPF) target list. To date, 29 of the 60 brightest TPF candidate stars (V ≤ 4.3) have each been observed on multiple nights. Preliminary analysis of these data indicates the possible detection of stellar companions to several of these stars.

Citation Download Citation

Donald J. Hutter, James A. Benson, Robert T. Zavala, Kenneth J. Johnston, Thomas A. Pauls, Christian A. Hummel, and J. Thomas Armstrong "Imaging stellar multiplicity with the NPOI", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); https://doi.org/10.1117/12.549955

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