Angular Momentum Evolution Of V455 Andromedae

Long-term data acquisition on the cataclysmic variable V455 Andromedae from October 2007 to 2013 revealed its rotation period to be 67.61970396 +/- 0.00000074 s. We constrain its rate of change of spin period with time: dP(spin)/dt = (-7.8 +/- 7.0) x 10(-15) s/s using the O-C method, and (-6.0 +/- 6.2) x 10(-15) s/s with a direct non-linear least squares fit. Given the large uncertainties, we do not claim to find any significant detection of a changing spin period for the duration October 2007-2013. We derive the periodic modulation in the O-C diagram due to the orbital motion of a clock in an elliptical orbit, and then show that this effect is negligible for our case.