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Orbital Period Increase in ES Ceti

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arxiv 1801.01049 v1 pith:JSH37FDK submitted 2018-01-03 astro-ph.SR

Orbital Period Increase in ES Ceti

Enrique de Miguel (1) , Joseph Patterson (2) , Jonathan Kemp (3) , Gordon Myers (4) , Robert Rea (4) , Thomas Krajci (4) , Berto Monard (4) , Lewis Cook (4) ((1) Univ. de Huelva
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(2) Columbia Univ. (3) Middlebury Coll. (4) Center for Backyard Astrophysics)
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keywords binarycetiperiodappearsassumptioncanumcataclysmicclass
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We report a long-term study of the eclipse times in the 10-minute helium binary ES Ceti. The binary period increases rapidly, with P/P-dot = 6.2x10^6 yr. This is consistent with the assumption that gravitational radiation (GR) drives the mass transfer, and appears to be the first dynamical evidence that GR is indeed the driver of evolution in this class of very old cataclysmic variables -- the AM Canum Venaticorum stars.

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