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Title
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First detection of a frequency multiplet in the line profile variations of RR Lyrae : towards an understanding of the Blazhko effect
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Author
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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Impact of large-scale surveys on pulsating star research
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Source (book)
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176th IAU Colloquium on the Impact of Large-Scale Surveys on Pulsating, Star Research, AUG 08-12, 1999, BUDAPEST, HUNGARY
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Publication
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San francisco
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Astronomical soc pacific
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2000
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ISBN
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1-58381-030-7
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Volume/pages
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203
(2000)
, p. 286-290
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ISI
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000089620700094
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Full text (open access)
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