Z CVn - Still mysterious

0500547 - ASÚ 2019 RIV CZ eng J - Článek v odborném periodiku
Skarka, Marek - Liška, J. - Dřevěný, R. - Sódor, A. - Kolenberg, B.
Z CVn - Still mysterious.
Open European Journal on Variable stars. Roč. 187, March (2018), s. 32-34. ISSN 1801-5964.
[Conference on Variable Stars Research /49./. Brno, 03.11.2017-05.11.2017]
Grant CEP: GA ČR(CZ) GC17-01752J
Institucionální podpora: RVO:67985815
Klíčová slova: long-term pulsation * short-term pulsation * Blazhko effect
Obor OECD: Astronomy (including astrophysics,space science)

We comment on short- and long-term pulsation period variations of Z CVn, a classical RR Lyrae star with the Blazhko effect. Z CVn shows cyclic-like O-C diagram that can be interpreted as a consequence of binarity throught the light travel time effect. We show that this hypothesis is false and that the observed long-term period variations must be caused by some effect that is intrinsic to the star. We also show that the Blazhko period is not simply anti-correlated with the long-term period variations as was suggested by previous authors.
Trvalý link: http://hdl.handle.net/11104/0292641