Systematic investigation of mid-term periodicity of the solar full-disk magnetic fields
文献类型：期刊论文
| 作者 | Xiang, Nan-Bin1,2,3 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2019-09-01 |
| 卷号 | 19期号:9页码:12 |
| ISSN号 | 1674-4527 |
| 关键词 | Sun: general Sun: activity Sun: magnetic fields |
| DOI | 10.1088/1674-4527/19/9/131 |
| 通讯作者 | Xiang, Nan-Bin(nanbin@ynao.ac.cn) |
| 英文摘要 | The Magnetic Plage Strength Index (MPSI) and the Mount Wilson Sunspot Index (MWSI), which have been measured at Mount Wilson Observatory (MWO) since the 1970s and which indicate weak and strong magnetic field activity on the solar full disk, respectively, are used to systematically investigate midterm periodicities in the solar full-disk magnetic fields. Multitudinous mid-term periodicities are detected in MPSI and MWSI on timescales of 0.3 to 4.5 yr, and these periodicities are found to fluctuate around several typical periodicities within a small amplitude in different solar cycles or phases. The periodicity of 3.44 yr is found in MPSI, and the periodicities of 3.85 and 3.00 yr are detected in MWSI. Our analysis indicates that they reflect the true oscillating signals of solar magnetic field activity. The typical periodicities are 2.8, 2.3 and 1.8 yr in MPSI and MWSI, and possible mechanisms for these periodicities are discussed. A 1.3 yr periodicity is only detected in MPSI, and should be related to meridional flows on the solar surface. The typical annual periodicity of MPSI and MWSI is 1.07 yr, which is not derived from the annual variation of Earth's heliolatitude. Several periodicities shorter than 1 yr found in MPSI and MWSI are considered to be Rieger-type periodicities. |
| WOS关键词 | NORTH-SOUTH ASYMMETRY ; SHORT-TERM PERIODICITIES ; MOUNT-WILSON ; ACTIVITY INDEXES ; WAVELET ANALYSIS ; SUNSPOT AREAS ; ROSSBY WAVES ; R-MODES ; OSCILLATIONS ; ROTATION |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000485147000009 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27877]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Xiang, Nan-Bin |
| 作者单位 | 1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China 2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100101, Peoples R China 3.Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiang, Nan-Bin. Systematic investigation of mid-term periodicity of the solar full-disk magnetic fields[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(9):12. |
| APA | Xiang, Nan-Bin.(2019).Systematic investigation of mid-term periodicity of the solar full-disk magnetic fields.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(9),12. |
| MLA | Xiang, Nan-Bin."Systematic investigation of mid-term periodicity of the solar full-disk magnetic fields".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.9(2019):12. |
入库方式： OAI收割
来源：紫金山天文台
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