Blazhko effect in Cepheids and RR Lyr stars

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Blazhko effect – pre-Kepler results - - occurrence rate: ~50% of the RRab stars are modulated Konkoly Blazhko Survey (Jurcsik et al. MNRAS 400, 1006, 2009) - long period modulations (~3000 d ) OGLE (Sosynski et al. AcA 61, 1, 2011) - tiny and rapid modulations e.g. SS Cnc P BL = 5.3 d - Jurcsik et al. AJ 132, 61, 2006 - stellar structure varies during the cycle Sódor et al. MNRAS 394, 261, 2009 - - - multiple modulation periods , e.g. CZ Lac Sódor et al. MNRAS 411, 1585, 2011
Kepler and the Blazhko effect Quasi-continuous data + extreme precision ---> - ~40% of the RRab stars are modulated - incredible diversity of modulation patterns - phase modulation in all Blazhko stars - Blazhko cycles are not strictly repetitive - long term variations of the modulation cycle - multiple modulation periods
Page 1 and 2: Blazhko effect in Cepheids and RR L
Page 3 and 4: RR Lyrae stars and the Blazhko effe
Page 5: The beginning On the changes in the
Page 9 and 10: Extreme modulation: V445 Lyr aka KI
Page 11 and 12: Multiple modulations longest P BL s
Page 13 and 14: Period doubling in RR Lyr (Q1+Q2)
Page 15 and 16: Period doubling in CoRoT data V1127
Page 17 and 18: Hydro results Kolláth, Molnár, Sz
Page 19 and 20: A new explanation for the Blazhko e
Page 21 and 22: Bifurcation cascades Bifurcation-ca
Page 23 and 24: Period-6 state, 3:4 resonance RR Ly
Page 25 and 26: Cepheids Amplitude variation in Cep
Page 27 and 28: Future
Page 29 and 30: Photometry EU: PLATO (PLAnetary Tra
Page 31 and 32: Spectroscopy Detection of He I and
Page 33 and 34: Blazhko effect - proposed mechanism
Page 35 and 36: Conclusions - Space photometry revi
Page 37: Thank you
Page 40 and 41: Nonlinear 'diagnostic' diagram Blue
Page 42 and 43: In collaboration with - K. Kolenber

Blazhko effect in Cepheids and RR Lyr stars

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