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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

K. Kolenberg ,
C. Aerts ,
M. Chadid  and
D. Gillet
K. Kolenberg
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium
C. Aerts
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium
M. Chadid
Affiliation:
European Southern Observatory, Alonso de Cordova, 3107, P.O. 19001, Santiago, Chile
D. Gillet
Affiliation:
Observatoire de Haute-Provence, Saint-Michel-l’Observatoire, F-04870, France

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.

Type
Part 4. Blazhko Phenomenon
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 286 - 290
Copyright
Copyright © Astronomical Society of the Pacific 2000

Footnotes

2

Aspirant Fellow, Fund for Scientific Research, Flanders

3

Postdoctoral Fellow, Fund for Scientific Research, Flanders

1

Based on observations obtained at the Haute-Provence Observatory in France

References

Aerts, C., De Pauw, M., & Waelkens, C. 1992, A&A, 266, 294 Google Scholar
Chadid, M. & Gillet, D. 1997, A&A, 319, 154 Google Scholar
Chadid, M., Kolenberg, K., Aerts, C., & Gillet, D. 2000, A&A, in pressGoogle Scholar
Cousens, A. 1983, MNRAS, 203, 1171 Google Scholar
Cox, A.N. 1993, in New Perspectives on Stellar Pulsation and Pulsating Stars, ed. Nemec, J.M. & Matthews, J. M. (Cambridge: Cambridge Univ. Press), 409 Google Scholar
Kovács, G. 1994, Ann. New York Acad. Sci., 706, 70 CrossRefGoogle Scholar
Kovács, G. 1995, A&A, 295, 693 Google Scholar
Kurtz, D.W. 1982, MNRAS, 200, 807 CrossRefGoogle Scholar
Roberts, D.H., Lehár, J., & Dreher, J.W. 1987, AJ, 93, 968 CrossRefGoogle Scholar
Romanov, Yu.S., Udovichenko, S.N., & Frolov, M.S. 1987, Sov. Astr. Lett., 13, 29 Google Scholar
Romanov, Yu.S., Udovichenko, S.N., & Frolov, M.S. 1994, Bul. Spec. Astrophys. Obs., 38, 169 Google Scholar
Shibahashi, H. & Takata, M. 1995, in ASP Conf. Ser. Vol. 83, Astrophysical Applications of Stellar Pulsation, ed. Stobie, R.S. & Whitelock, P.A. (San Francisco: ASP), 42 Google Scholar
Shibahashi, H. 2000, in these proceedings, p. 299Google Scholar
Stellingwerf, R.F. 1978, ApJ, 224, 953 CrossRefGoogle Scholar
Szeidl, B. & Koiláth, Z. 2000, in these proceedings, p. 281Google Scholar
Van Hoolst, T., Dziembowski, W.A., & Kawaler, S.D. 1998, MNRAS, 297, 536 Google Scholar
Van Hoolst, T. 2000, in these proceedings, p. 307Google Scholar