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Abstract
Context. The increasing interest in understanding stellar magnetic activity cycles is a strong motivation for the development of parameterized starspot models which can be constrained observationally.
Aims. In this work we develop an empirical tool for the stochastic reconstruction of sunspot cycles, using the average solar properties as a reference.
Methods. The synthetic sunspot cycle is compared with the sunspot data extracted from the National Geophysical Data Center, in particular using the Kolmogorov-Smirnov test. This tool yields synthetic spot group records, including date, area, latitude, longitude, rotation rate of the solar surface at the group’s latitude, and an identification number.
Results. Comparison of the stochastic reconstructions with the daily sunspot records confirms that our empirical model is able to successfully reproduce the main properties of the solar sunspot cycle. As a by-product of this work, we show that the Gnevyshev-Waldmeier rule, which describes the spots’ area-lifetime relation, is not adequate for small groups and we propose an effective correction to that relation which leads to a closer agreement between the synthetic sunspot cycle and the observations.
Aims. In this work we develop an empirical tool for the stochastic reconstruction of sunspot cycles, using the average solar properties as a reference.
Methods. The synthetic sunspot cycle is compared with the sunspot data extracted from the National Geophysical Data Center, in particular using the Kolmogorov-Smirnov test. This tool yields synthetic spot group records, including date, area, latitude, longitude, rotation rate of the solar surface at the group’s latitude, and an identification number.
Results. Comparison of the stochastic reconstructions with the daily sunspot records confirms that our empirical model is able to successfully reproduce the main properties of the solar sunspot cycle. As a by-product of this work, we show that the Gnevyshev-Waldmeier rule, which describes the spots’ area-lifetime relation, is not adequate for small groups and we propose an effective correction to that relation which leads to a closer agreement between the synthetic sunspot cycle and the observations.
Original language | English |
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Article number | A62 |
Number of pages | 9 |
Journal | Astronomy and Astrophysics |
Volume | 580 |
Early online date | 31 Jul 2015 |
DOIs | |
Publication status | Published - Aug 2015 |
Keywords
- Sun: activity
- Sun: oscillations
- stars: activity
- stars: oscillations
- sunspots
- starspots
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Dive into the research topics of 'Spot cycle reconstruction: an empirical tool: Application to the sunspot cycle'. Together they form a unique fingerprint.Projects
- 1 Finished
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Asteroseismology and Helioseismology at Birmingham and Queen Mary
Chaplin, B. (Principal Investigator), Elsworth, Y. (Co-Investigator) & Miglio, A. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/04/15 → 30/09/18
Project: Research Councils