On the ephemeris of the eclipsing polar HU Aquarii. II: New eclipse epochs obtained 2014 - 2018

30 Oct 2018  ·  Schwope A. D., Thinius B. D. ·

The magnetic cataclysmic variable HU Aquarii displayed pronounced modulations of its eclipse timing. These were intensively modeled and discussed in recent years in the framework of planets orbiting the binary or the Applegate effect... No scenario yielded a unique and satisfactory interpretation of the data. Here we present 26 new eclipse epochs obtained between 2014 and 2018. The steep and continuous decrease of the orbital period observed in the time interval 2010 - 2013 has slowed down sometimes before mid 2016. The new slope in the (O-C)-diagram of eclipse arrival times will further constrain physical models of its complex shape. read more

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Solar and Stellar Astrophysics