2024-03-29T08:32:54Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02007565
2022-10-31T03:23:19Z
1642837622505:1642837957109:1642837987823
1642838403551:1642838406414
太陽活動極小期における太陽面上のマグネトグラム時系列の特徴
Characteristics for Time Series of Solar Magnetograms and Grand Minima of Solar Activity
清野, 光弘
島袋, 知巳
Seino, Mitsuhiro
Shimabukuro, Tomomi
Time series of satellite image data for SOHO/MDI Continuum and Magnetogram from 1997 to 2010, and for SDO/HMI Continuum and Magnetogram from 2011 to 2012 are analyzed. The occupancies of sunspot pixels in Continuum and of pixels for positive and the negative magnetic polarities in Magnetogram are calculated. By box-counting method, packing exponents for sunspot pixels in Continuum and packing exponents for positive polarity pixels and negative polarity pixels in Magnetogram are evaluated. Packing exponents of Continuum and Magnetogram from 1997 to 2012, power spectra with peaks are calculated by using Fourier transform, respectively. A first peak of the power spectra is determined, and time intervals between nearest neighbor peaks are valued. The behavior of the packing exponents represented with time series are discribed in detail and discussed.
紀要論文
http://purl.org/coar/resource_type/c_6501
琉球大学理学部
Faculty of Science University of the Ryukyus
2013-09-30
VoR
http://hdl.handle.net/20.500.12000/27754
0286-9640
AN00250774
琉球大学理学部紀要
BULLETIN OF THE FACULTY OF SCIENCE UNIVERSITY OF THE RYUKYUS
96
24
1
jpn
open access