DECIPHERING SOLAR MAGNETIC ACTIVITY. I. ON THE RELATIONSHIP BETWEEN THE SUNSPOT CYCLE AND THE EVOLUTION OF SMALL MAGNETIC FEATURES

被引:81
作者
McIntosh, Scott W. [1 ]
Wang, Xin [1 ,2 ]
Leamon, Robert J. [3 ]
Davey, Alisdair R. [4 ]
Howe, Rachel [5 ]
Krista, Larisza D. [6 ]
Malanushenko, Anna V. [3 ,7 ]
Markel, Robert S. [1 ]
Cirtain, Jonathan W. [8 ]
Gurman, Joseph B. [9 ]
Pesnell, William D. [9 ]
Thompson, Michael J. [1 ]
机构
[1] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA
[2] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
[3] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[5] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
[6] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80205 USA
[7] Lockheed Martin Solar & Astrophys Lab, Palo Alto, CA 94304 USA
[8] Marshall Space Flight Ctr, Huntsville, AL 35812 USA
[9] NASA, Goddard Space Flight Ctr, Solar Phys Lab, Greenbelt, MD 20771 USA
基金
美国国家科学基金会;
关键词
Sun: activity; Sun: atmosphere; Sun: evolution; Sun: general; Sun: interior; Sun: rotation; sunspots; DIFFERENTIAL ROTATION; MERIDIONAL CIRCULATION; DYNAMO SIMULATION; SUN; OSCILLATIONS; TELESCOPE; LOOPS; FIELD; FLOW;
D O I
10.1088/0004-637X/792/1/12
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Sunspots are a canonical marker of the Sun's internal magnetic field which flips polarity every similar to 22 yr. The principal variation of sunspots, an similar to 11 yr variation, modulates the amount of the magnetic field that pierces the solar surface and drives significant variations in our star's radiative, particulate, and eruptive output over that period. This paper presents observations from the Solar and Heliospheric Observatory and Solar Dynamics Observatory indicating that the 11 yr sunspot variation is intrinsically tied to the spatio-temporal overlap of the activity bands belonging to the 22 yr magnetic activity cycle. Using a systematic analysis of ubiquitous coronal brightpoints and the magnetic scale on which they appear to form, we show that the landmarks of sunspot cycle 23 can be explained by considering the evolution and interaction of the overlapping activity bands of the longer-scale variability.
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页数:19
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