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M.T. Wolff, P.S. Ray, K.S. Wood (Naval Research Laboratory)
Eclipsing systems such as the low mass X-ray binary (LMXB) EXO0748-676 provide natural orbit phase markers with which to monitor changes in the orbital period. Orbital period changes are an important diagnostic for understanding LMXB accretion-induced angular momentum exchange and overall system evolution. We present our most recent results for the eclipse timing of the LMXB EXO0748-676. Since its discovery in 1985 it has apparently undergone three distinct orbital period "epochs", each characterized by a different orbital period than the previous epoch. We outline the orbital period behavior for EXO0748-676 over the past 19 years and discuss the implications of this behavior in light of current theoretical ideas for LMXB evolution.
The author(s) of this abstract have provided an email address for comments about the abstract: Michael.Wolff@nrl.nvy.mil
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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.