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First Detection of a Frequency Multiplet in the Line Profile Variations of RR Lyrae: Towards an Understanding of the Blazhko Effect1
Published online by Cambridge University Press: 12 April 2016
Abstract
We provide the first detection of a frequency multiplet in the line profile variations of RR Lyrae. Performing a period analysis on 669 high resolution line profiles obtained with the spectrograph ELODIE at OHP, we clearly detect a multiplet structure, with a separation equal to the Blazhko frequency, around the main frequency and its harmonics. The triplet components are very prominent; additional observations are needed to decide about the existence of a quintuplet. The complete understanding of the origin of the Blazhko effect still needs further theoretical modelling and better observations. Our detection of the frequency multiplet in the line profile variations is a first essential step towards a decisive confrontation between the theoretical models and the observations.
- Type
- Part 4. Blazhko Phenomenon
- Information
- Copyright
- Copyright © Astronomical Society of the Pacific 2000
Footnotes
Aspirant Fellow, Fund for Scientific Research, Flanders
Postdoctoral Fellow, Fund for Scientific Research, Flanders
Based on observations obtained at the Haute-Provence Observatory in France
References
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