Effects of Hysteresis Between Maximum CME Speed Index and Typical Solar Activity Indicators During Cycle 23
| Autor: | Ali Kilcik, Atila Özgüç, J. P. Rozelot |
|---|---|
| Přispěvatelé: | Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Solar minimum Sunspot Index (economics) 010504 meteorology & atmospheric sciences Meteorology Solar cycle 23 Flux Astronomy and Astrophysics Astrophysics Solar irradiance 01 natural sciences Hysteresis 13. Climate action Space and Planetary Science Physics::Space Physics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Saturation (chemistry) 010303 astronomy & astrophysics ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Solar Physics Solar Physics, Springer Verlag, 2012, 264, pp.255-268. ⟨10.1007/s11207-012-0087-5⟩ |
| ISSN: | 1573-093X 0038-0938 |
| DOI: | 10.1007/s11207-012-0087-5 |
| Popis: | Using the smoothed time series of maximum CME speed index for solar cycle 23, it is found that this index, analyzed jointly with six other solar activity indicators, shows a hysteresis phenomenon. The total solar irradiance, coronal index, solar radio flux (10.7 cm), Mg ii core-to-wing ratio, sunspot area, and Hα flare index follow different paths for the ascending and the descending phases of solar cycle 23, while a saturation effect exists at the maximum phase of the cycle. However, the separations between the paths are not the same for the different solar activity indicators used: the Hα flare index and total solar irradiance depict broad loops, while the Mg ii core-to-wing ratio and sunspot area depict narrow hysteresis loops. The lag times of these indices with respect to the maximum CME speed index are discussed, confirming that the hysteresis represents a clue in the search for physical processes responsible for changing solar emission. |
| Databáze: | OpenAIRE |
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