An Interferometric Search for Bright Companions to 51 Pegasi

Details An Interferometric Search for Bright Companions to 51 Pegasi An Interferometric Search for Bright Companions to 51 Pegasi

1998-04-02

arxiv.org/abs/astro-ph/9804016v1

Astronomy and Astrophysics

Astrophysics

15 pages, 3 figures, ApJL in press

Scientific paper

10.1086/311560

We report on a near-infrared, long-baseline interferometric search for luminous companions to the star 51 Pegasi conducted with the Palomar Testbed Interferometer. Our data is completely consistent with a single-star hypothesis. We find no evidence to suggest a luminous companion to 51 Pegasi, and can exclude a companion brighter than a $\Delta$K of 4.27 at the 99% confidence level for the 4.2-day orbital period indicated by spectroscopic measurements. This $\Delta$K corresponds to an upper limit in the companion M$_K$ of 7.30, in turn implying a main-sequence companion mass less than 0.22 M$_{\sun}$.

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