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Long-Term Variations in the β CEPHEI Stars 16 (EN) LAC and ν ERI

Published online by Cambridge University Press:  14 August 2015

M. Jerzykiewicz  and
A. Pigulski
M. Jerzykiewicz
Affiliation:
Wroclaw University Observatory, Wroclaw, Poland (mjerz,pigulski)@astro.uni.wroc.pl
A. Pigulski
Affiliation:
Wroclaw University Observatory, Wroclaw, Poland (mjerz,pigulski)@astro.uni.wroc.pl

Extract

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Using all available data, we investigate long-term variations of the amplitudes of the three strongest pulsation modes of 16 (EN) Lac and the period of the strongest mode of ν Eri. We show that in case of 16 (EN) Lac there are feasible explanations of the observed variations. The explanations involve non-linear interaction between pulsation modes (the first two observed modes) and beating between two non-interacting modes (the third observed mode). In case of ν Eri, however, we can only indicate the difficulty of accounting for the long-term period variation.

MJ gratefully acknowledges an IAU travel grant. This work was supported by KBN grant 2P03D01611.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 1: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part A), 1997 , 1998 , pp. 348
Copyright
Copyright © Kluwer 1998