Session C1: Poster Session (5:00 p.m.-6:00 p.m.)

5:00 PM–5:00 PM, Friday, May 16, 2008
Templeton Room: Fields Dining Hall

Chair: Kara Keeter, Idaho State University

Abstract ID: BAPS.2008.NWS.C1.13

Abstract: C1.00013 : Patterns in the Long Term Behavior of Eclipsing Binary Star System 44i-Bootis

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Authors:

  Caitlin Byrd-Fisher
  Jeanine Fallen Bailey
  Thomas Olsen
    (Lewis \& Clark College, Portland, OR)

Previously, we have assembled data on the binary star system 44i Bootis, collected by our group and others over nearly a century, concerning the timing of its primary eclipses. These have been previously modeled by an ephemeris equation, assuming a constant orbital period. We have previously shown that the system is slowing down a uniform rate. We present data demonstrating a small sinusoidal trend in the remaining differences between eclipse time observations and calculations (an O-C diagram). We sought to model the cause of this variation by the gravitational interaction of a planet orbiting the binary star pair. Such a planet would necessarily be a brown dwarf of 0.0475 solar masses, with a semi-major axis of 10.729 AU. We are examining the stability of such an orbit. We also present initial data for the binary star system VW Cephei.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.NWS.C1.13