High-resolution magnetic field measurements of RR Lyrae stars with SemPol

Guggenberger, E. and Kolenberg, K. and Marsden, S. C. and Waite, I. A. and Henrichs, H. F. and Luftinger, T. (2009) High-resolution magnetic field measurements of RR Lyrae stars with SemPol. In: International Conference on Stellar Pulsation: Challenges for Theory and Observation, 31 May-5 Jun 2009, Santa Fe, NM. United States.


For more than 30 years, there have been attempts to explain the Blazhko effect in RR Lyrae stars with the presence of strong magnetic fields (Mestel 1975, Cousins 1983, Shibahashi & Takata 1995, Shibahashi 2000). These so-called magnetic models are counted among the most promising explanations for the century-old puzzle of the Blazhko effect. The measurements of magnetic fields in RR Lyrae stars, however, have for a long time been sparse and contradictory. In December 2008 we devoted an observing campaign to the measurement of magnetic fields of a sample of bright RR Lyrae pulsators using the SemPol instrument at the 3.9 m Anglo-Australian Telescope. Preliminary results and challenges of this campaign are presented in this paper.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2009 American Institute of Physics. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 08 Dec 2011 03:14
Last Modified: 20 Oct 2014 01:24
Uncontrolled Keywords: RR Lyr stars; variable stars; stellar pulsations
Fields of Research : 02 Physical Sciences > 0204 Condensed Matter Physics > 020404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020109 Space and Solar Physics
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020107 Mesospheric, Ionospheric and Magnetospheric Physics
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1063/1.3246492
URI: http://eprints.usq.edu.au/id/eprint/20148

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