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On long-term solar activity at high latitudes
Li KJ(李可军)1; Mu J(穆军)1,2; Li QX(李启秀)1,2; Li, KJ (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2007-03-21
Volume376Issue:1Pages:L39-L42
DOI10.1111/j.1745-3933.2007.00281.x
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun : Activity Sun : General Sun : Magnetic Fields
AbstractThe interesting characteristics of long-term solar activity at high latitudes are reported as follows. (1) Two cyclic behaviours, but in anti-phase with each other, simultaneously exist at high latitudes: the magnetic fluxes in units of gauss of the line-of-sight magnetic fields at latitudes of 60 degrees-70 degrees, possibly representing the amplitude of solar magnetic activity at high latitudes, are in complete anti-phase with the solar activity at middle and low latitudes, usually represented by sunspot numbers. However, the numbers of filaments at latitudes of 60 degrees-90 degrees, possibly representing the complexity of solar magnetic activity at high latitudes, are strangely in complete anti-phase with the magnetic fluxes. (2) Two latitude migrations, but in opposite drift directions relative to each other, exist in a cycle: a poleward migration drifts from the middle latitudes toward the solar poles in the first half of a normal cycle, following an equatorward migration found from the solar poles towards the middle latitudes in the other half of the normal cycle. (3) It is inferred that polar faculae, a frequently observed phenomenon at high latitudes, are more related to the amplitude than to the complexity of solar magnetic activity at high latitudes, and they are in phase with the magnetic fluxes. (4) High-latitude flares, a violent active phenomenon at high latitudes, keep in step with neither the amplitude nor the complexity of solar magnetic activity at high latitudes; they seemingly occur just around the maximum times of both.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0035-8711
URL查看原文
Archive Date2007-04-12
WOS IDWOS:000244886400009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVITY CYCLE
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6108
Collection太阳物理研究组
Corresponding AuthorLi, KJ (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011, China
2.School of Graduate, CAS, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li KJ,Mu J,Li QX,et al. On long-term solar activity at high latitudes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,376(1):L39-L42.
APA Li KJ,Mu J,Li QX,&Li, KJ .(2007).On long-term solar activity at high latitudes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,376(1),L39-L42.
MLA Li KJ,et al."On long-term solar activity at high latitudes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 376.1(2007):L39-L42.
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