Publications of the Astronomical Society of Australia

Research Article

High-resolution Spectroscopy and Spectropolarimetry of Some Late F- / Early G-type Sun-like Stars as Targets for Zeeman Doppler Imaging

I. A. Waitea1 c1, S. C. Marsdena1a2, B. D. Cartera1, E. Aléciana3, C. Browna1, D. Burtona1 and R. Harta1

a1 Faculty of Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia

a2 Centre for Astronomy, School of Engineering and Physical Sciences, James Cook University, Townsville, QLD 4811, Australia

a3 LESIA, Observatoire de Paris-Meudon, F-92195 Meudon Cedex, France

Abstract

High-resolution spectroscopy and spectropolarimetry have been undertaken at the Anglo-Australian Telescope in order to identify suitable targets for magnetic studies of young Sun-like stars, for the proxy study of early solar evolution. This study involved the investigation of some variable late F- / early G-type Sun-like stars originally identified by the Hipparcos mission. Of the 38 stars observed for this study, HIP 31021, HIP 64732, HIP 73780 were found to be spectroscopic binary stars, while HIP 19072, HIP 67651 and HIP 75636 are also likely to be binaries and HIP 33111 could even be a triple system. Magnetic fields were detected on a number of the survey stars: HIP 21632, HIP 43720, HIP 48770, HIP 62517, HIP 71933, HIP 77144, HIP 89829, HIP 90899 and HIP 105388, making these stars good candidates for follow-up Zeeman Doppler imaging studies.

(Received June 12 2011)

(Accepted September 03 2011)

Keywords

  • stars: activity;
  • stars: chromospheres;
  • stars: magnetic fields;
  • stars: spots and rotation

Correspondence:

c1 Corresponding author. Email: waite@usq.edu.au

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