Long-term asymmetry in the wings of the butterfly diagram
- Aims. Sunspot distribution in the northern and southern solar hemispheres exibit striking synchronous behaviour on the scale of a Schwabe cycle. However, sometimes the bilateral symmetry of the Butterfly diagram relative to the solar equatorial plane breaks down. The investigation of this phenomenon is important to explaining the almost-periodic behaviour of solar cycles. Methods. We use cross-recurrence plots for the study of the time-varying phase asymmetry of the northern and southern hemisphere and compare our results with the latitudinal distribution of the sunspots. Results. We observe a long-term persistence of phase leading in one of the hemispheres, which lasts almost 4 solar cycles and probably corresponds to the Gleissberg cycle. Long-term variations in the hemispheric-leading do not demonstrate clear periodicity but are strongly anti-correlated with the long-term variations in the magnetic equator.
Author details: | Nadezhda V. Zolotova, Dmitri I. Ponyavin, Norbert MarwanORCiDGND, Jürgen KurthsORCiDGND |
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URL: | http://www.aanda.org/ |
DOI: | https://doi.org/10.1051/0004-6361/200811430 |
ISSN: | 0004-6361 |
Publication type: | Article |
Language: | English |
Year of first publication: | 2009 |
Publication year: | 2009 |
Release date: | 2017/03/25 |
Source: | Astronomy and astrophysics. - ISSN 0004-6361. - 503 (2009), 1, S. 197 - 201 |
Organizational units: | Zentrale und wissenschaftliche Einrichtungen / Interdisziplinäres Zentrum für Dynamik komplexer Systeme |
Peer review: | Referiert |