Published February 25, 2021 | Version v1
Poster Open

Finding a second Sun - How can we detect solar-like magnetic cycles with Zeeman-Doppler-Imaging (ZDI)?

  • 1. Institut de Recherche en Astrophysique et Planétologie, UPS-OMP, Toulouse, France; SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, UK
  • 2. European Space Research and Technology Centre (ESTEC), ESA, Noordwijk, The Netherlands; Institut de Recherche en Astrophysique et Planétologie, UPS-OMP, Toulouse, France; European Southern Observatory, Garching, Germany
  • 3. School of Physics, Trinity College Dublin, The University of Dublin, Ireland
  • 4. SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, UK
  • 5. School of Mathematics and Statistics, University of St Andrews, St Andrews, UK

Contributors

Editor:

Description

Spectropolarimetric surveys have now been running for long enough to reveal solar-like magnetic activity cycles, e.g., for 61 Cyg A (Boko Saikia et al. 2018). Our work examines if a solar-like cycle can be observed with ZDI, given that this technique only detects the large-scale field for very slowly-rotating and low-activity stars like our Sun. We aim to determine the best strategy to detect stellar cycles, and which parameters are most sensitive to cycle changes.

This poster presents our paper: Lehmann, L. T., et al., 2021, MNRAS, 500, 1243
(https://ui.adsabs.harvard.edu/abs/2021MNRAS.500.1243L)

 

Notes

LTL acknowledges support from the Scottish Universities Physics Alliance (SUPA) prize studentship and the University of St Andrews Higgs studentship. LTL and GH would like to thank the ESO Directorate for Science, which provided funds to support this collaboration. GH also warmly thanks the IDEX initiative at Université Federale Toulouse Midi-Pyrenees (UFTMiP) for funding the STEPS collaboration program between IRAP/OMP and ESO.

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Additional details

Related works

References
Journal article: 2021MNRAS.500.1243L (Bibcode)

Funding

NewWorlds – Magnetic Fields and the Formation of New Worlds 740651
European Commission
ASTROFLOW – The influence of stellar outflows on exoplanetary mass loss 817540
European Commission
Astronomy at St Andrews 2015-2018 ST/M001296/1
UK Research and Innovation
WHOLE SUN – The Whole Sun Project: Untangling the complex physical mechanisms behind our eruptive star and its twins 810218
European Commission

References

  • Boro Saikia S., et al., 2018, A&A, 620, L11
  • Lehmann L. T., Hussain G. A. J., Jardine M. M., Mackay D. H., Vidotto A. A., 2019, MNRAS, 483, 5246
  • Yeates A. R., Mackay D. H., 2012, ApJ, 753, L34