Period doubling in Kepler RR Lyrae stars

Details Period doubling in Kepler RR Lyrae stars Period doubling in Kepler RR Lyrae stars

2011-11-11

arxiv.org/abs/1111.2815v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

In proceedings of "20th Stellar Pulsation Conference Series: Impact of new instrumentation & new insights in stellar pulsation

Scientific paper

The origin of the conspicuous amplitude and phase modulation of the RR Lyrae pulsation - known as the Blazhko effect - is still a mystery after more than 100 years of its discovery. With the help of the Kepler space telescope we have revealed a new and unexpected phenomenon: period doubling in RR Lyr - the eponym and prototype of its class - as well as in other Kepler Blazhko RR Lyrae stars. We have found that period doubling is directly connected to the Blazhko modulation. Furthermore, with hydrodynamic model calculations we have succeeded in reproducing the period doubling and proved that the root cause of this effect is a high order resonance (9:2) between the fundamental mode and the 9th radial overtone, which is a strange mode. We discuss the implications of these recent findings on our understanding of the century-old Blazhko problem.

Affiliated with

Also associated with

No associations

Rating

Period doubling in Kepler RR Lyrae stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Period doubling in Kepler RR Lyrae stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Period doubling in Kepler RR Lyrae stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-140162