Recent Changes in the Orbital Periods of Some Eclipsing SW Sextantis Stars

Details Recent Changes in the Orbital Periods of Some Eclipsing SW Sextantis Stars Recent Changes in the Orbital Periods of Some Eclipsing SW Sextantis Stars

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...218.9601b&link_type=abstract

American Astronomical Society, AAS Meeting #218, #96.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of a project to look for changes in the orbital periods of 18 eclipsing cataclysmic variables known as SW Sextantis stars by combining new measurements of eclipse times with historical data stretching back in some cases over 50 years. While the O-C plots for many of these binary systems are consistent with a constant orbital period, for some there is persuasive evidence that their orbital periods have changed over this time interval. These changes have been investigated and quantified. New ephemerides are provided for all 18 stars to facilitate observation of future eclipses.

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