HR: 09:45h
AN: SH31A-06    [Abstracts]
TI: N-S asymmetry, area and longitudinal distributions of sunspots and their magnetic fields in different phases on the solar cycle 23.
AU: * Zharkov, S I
EM: s.zharkov@brad.ac.uk
AF: Bradford University, Cybernetics Department, Bradford, BD7 1DP United Kingdom
AU: Zharkova, V V
EM: v.v.zharkova@brad.ac.uk
AF: Bradford University, Cybernetics Department, Bradford, BD7 1DP United Kingdom
AB: The statistical analysis of sunspot area and their magnetic field distributions are presented for the 1996-2004 data in the Solar Feature Catalogues (SFC) automatically extracted from the SOHO/NDI white light solar images and magnetograms. The number of sunspots is found to increase exponentially with the area decrease with a slightly increasing index from the solar minimum to its maximum. The N-S asymmetry in sunspot area distributions and its periodicity for different phases of the solar cycle and hemispheres is investigated. There is also a strong North-South asymmetry in the longitudes of sunspots appearance that varies with the phase of the solar cycle. The magnetic field distributions for the total and excess fluxes on the sunspot heliospheric longitude and latitude are presented for different phases of the solar cycle. These statistical properties of sunspots and their magnetic field are discusses in compariosn with those predicted by the turbulent dynamo theory.
UR: http://inf.brad.ac.uk/egso
DE: 7529 Photosphere
DE: 7536 Solar activity cycle (2162)
DE: 7538 Solar irradiance
DE: 7544 Stellar interiors and dynamo theory
DE: 7594 Instruments and techniques
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly