Direct observation of magnetic cycles in Sun-like stars
A sample of 19 solar-type stars, probing masses between 0.6 and 1.4 solar masses and rotation periods between 3.4 and 43 days, was regularly observed using the NARVAL spectropolarimeter at Telescope Bernard Lyot (Pic du Midi, France) between 2007 and 2011. The Zeeman-Doppler Imaging technique is emp...
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ftusqland:oai:research.usq.edu.au:q277w 2023-05-15T18:50:45+02:00 Direct observation of magnetic cycles in Sun-like stars Morgenthaler, A. Petit, P. Morin, J. Auriere, M. Dintrans, B. Konstantinova-Antova, R. Marsden, S. 2011 https://research.usq.edu.au/item/q277w/direct-observation-of-magnetic-cycles-in-sun-like-stars https://doi.org/10.1002/asna.201111592 unknown https://doi.org/10.1002/asna.201111592 Morgenthaler, A., Petit, P., Morin, J., Auriere, M., Dintrans, B., Konstantinova-Antova, R. and Marsden, S. 2011. "Direct observation of magnetic cycles in Sun-like stars." Astronomische Nachrichten. 332 (9-10), pp. 866-871. https://doi.org/10.1002/asna.201111592 stars magnetic fields rotation polarimetric article PeerReviewed 2011 ftusqland https://doi.org/10.1002/asna.201111592 2023-01-03T12:51:52Z A sample of 19 solar-type stars, probing masses between 0.6 and 1.4 solar masses and rotation periods between 3.4 and 43 days, was regularly observed using the NARVAL spectropolarimeter at Telescope Bernard Lyot (Pic du Midi, France) between 2007 and 2011. The Zeeman-Doppler Imaging technique is employed to reconstruct the large-scale photospheric magnetic field structure of the targets and investigate its long-term temporal evolution. We present here the first results of this project with the observation of short magnetic cycles in several stars, showing up a succession of polarity reversals over the timespan of our monitoring. Preliminary trends suggest that short cycles are more frequent for stellar periods below a dozen days and for stellar masses above about one solar mass. The cycles lengths unveiled by the direct tracking of polarity switches are significantly shorter than those derived from previous studies based on chromospheric activity monitoring, suggesting the coexistence of several magnetic timescales in a same star. Article in Journal/Newspaper narval narval University of Southern Queensland: USQ ePrints Astronomische Nachrichten 332 9-10 866 871 |
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University of Southern Queensland: USQ ePrints |
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ftusqland |
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topic |
stars magnetic fields rotation polarimetric |
spellingShingle |
stars magnetic fields rotation polarimetric Morgenthaler, A. Petit, P. Morin, J. Auriere, M. Dintrans, B. Konstantinova-Antova, R. Marsden, S. Direct observation of magnetic cycles in Sun-like stars |
topic_facet |
stars magnetic fields rotation polarimetric |
description |
A sample of 19 solar-type stars, probing masses between 0.6 and 1.4 solar masses and rotation periods between 3.4 and 43 days, was regularly observed using the NARVAL spectropolarimeter at Telescope Bernard Lyot (Pic du Midi, France) between 2007 and 2011. The Zeeman-Doppler Imaging technique is employed to reconstruct the large-scale photospheric magnetic field structure of the targets and investigate its long-term temporal evolution. We present here the first results of this project with the observation of short magnetic cycles in several stars, showing up a succession of polarity reversals over the timespan of our monitoring. Preliminary trends suggest that short cycles are more frequent for stellar periods below a dozen days and for stellar masses above about one solar mass. The cycles lengths unveiled by the direct tracking of polarity switches are significantly shorter than those derived from previous studies based on chromospheric activity monitoring, suggesting the coexistence of several magnetic timescales in a same star. |
format |
Article in Journal/Newspaper |
author |
Morgenthaler, A. Petit, P. Morin, J. Auriere, M. Dintrans, B. Konstantinova-Antova, R. Marsden, S. |
author_facet |
Morgenthaler, A. Petit, P. Morin, J. Auriere, M. Dintrans, B. Konstantinova-Antova, R. Marsden, S. |
author_sort |
Morgenthaler, A. |
title |
Direct observation of magnetic cycles in Sun-like stars |
title_short |
Direct observation of magnetic cycles in Sun-like stars |
title_full |
Direct observation of magnetic cycles in Sun-like stars |
title_fullStr |
Direct observation of magnetic cycles in Sun-like stars |
title_full_unstemmed |
Direct observation of magnetic cycles in Sun-like stars |
title_sort |
direct observation of magnetic cycles in sun-like stars |
publishDate |
2011 |
url |
https://research.usq.edu.au/item/q277w/direct-observation-of-magnetic-cycles-in-sun-like-stars https://doi.org/10.1002/asna.201111592 |
genre |
narval narval |
genre_facet |
narval narval |
op_relation |
https://doi.org/10.1002/asna.201111592 Morgenthaler, A., Petit, P., Morin, J., Auriere, M., Dintrans, B., Konstantinova-Antova, R. and Marsden, S. 2011. "Direct observation of magnetic cycles in Sun-like stars." Astronomische Nachrichten. 332 (9-10), pp. 866-871. https://doi.org/10.1002/asna.201111592 |
op_doi |
https://doi.org/10.1002/asna.201111592 |
container_title |
Astronomische Nachrichten |
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332 |
container_issue |
9-10 |
container_start_page |
866 |
op_container_end_page |
871 |
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1766244506274889728 |