The HU Aqr planetary system hypothesis revisited

  title={The HU Aqr planetary system hypothesis revisited},
  author={Krzysztof Goździewski and Aga Słowikowska and Dinko P. Dimitrov and Krzysztof Krzeszowski and Michal Zejmo and G.Kanbach and Vadim Burwitz and Arne Rau and P. Irawati and Andrea Richichi and Marcin P. Gawroński and Grzegorz Nowak and Ilham Nasiroglu and Dominik J{\'o}zef Kubicki},
  journal={Monthly Notices of the Royal Astronomical Society},
We study the mid-egress eclipse timing data gathered for the cataclysmic binary HU Aquarii during the years 1993-2014. The (O-C) residuals were previously attributed to a single ~7 Jupiter mass companion in ~5 au orbit or to a stable 2-planet system with an unconstrained outermost orbit. We present 22 new observations gathered between June, 2011 and July, 2014 with four instruments around the world. They reveal a systematic deviation of ~60 - 120 seconds from the older ephemeris. We re-analyse… 

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