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Proceedings Paper

Imaging stellar multiplicity with the NPOI
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Paper 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.

Paper Details

Date Published: 20 October 2004
PDF: 9 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.549955
Show Author Affiliations
Donald J. Hutter, U.S. Naval Observatory (United States)
James A. Benson, U.S. Naval Observatory (United States)
Robert T. Zavala, U.S. Naval Observatory (United States)
Kenneth J. Johnston, U.S. Naval Observatory (United States)
Thomas A. Pauls, Naval Research Lab. (United States)
Christian A. Hummel, European Southern Observatory (Chile)
J. Thomas Armstrong, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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