Contamination of RR Lyrae stars from Binary Evolution Pulsators

Contamination of RR Lyrae stars from Binary Evolution Pulsators

Paulina Karczmarek, Grzegorz Pietrzyński, Krzysztof Belczyński, Kazimierz Stępień, Grzegorz Wiktorowicz, Krystian Iłkiewicz

Binary Evolution Pulsator (BEP) is an extremely low-mass member of a binary system, which pulsates as a result of a former mass transfer to its companion. BEP mimics RR Lyrae-type pulsations but has different internal structure and evolution history. We present possible evolution channels to produce BEPs, and evaluate the contamination value, i.e. how many objects classified as RR Lyrae stars can be undetected BEPs. In this analysis we use population synthesis code StarTrack.

Proceedings of the Polish Astronomical Society, vol. 3, 45-47 (2016)

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