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The Green Corona and Magnetic Fields

机译:绿色电晕和磁场

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摘要

We present results of a study of the green corona (530.3 nm, Fe xiv) and photospheric magnetic fields over the period 1976–1999 when both quantities were observed by ground-based observatories. By comparing both the limb green-line intensities and photospheric magnetograms we have found a relation between the strength of magnetic field and coronal intensities. This relation enables us to extend solar surface magnetic fields since 1976 back to 1939. From 1947 to 1992 the magnetic field strength grew at the cycle maxima by a factor of 1.5–2. On the other hand, both the green corona intensity and magnetic field strength in the present cycle are smaller compared to cycle 22, by a factor of 2. No relationship was found between the green corona intensities and magnetic field polarity as was previously supposed. Behavior for the green corona intensities is different between high-latitude and mid-latitude regions, and this break occurs at the heliographic latitude of ± 45°. Homogeneous coronal data set cannot be directly used to derive `the tilt angle', even though some similarities between the green coronal holes, poleward branches in the green corona and prominences and the tilt angle can be found.
机译:当地面观测台观测到这两个量时,我们将给出1976-1999年间绿色电晕(530.3 nm,Fe xiv)和光球磁场的研究结果。通过比较肢体绿线强度和光球磁图,我们发现了磁场强度和日冕强度之间的关系。这种关系使我们能够将1976年以来的太阳表面磁场扩展到1939年。从1947年到1992年,磁场强度以最大周期增长了1.5–2倍。另一方面,与周期22相比,当前周期中的绿色电晕强度和磁场强度都小2倍。在绿色电晕强度和磁场极性之间没有发现关系。在高纬度和中纬度区域,绿色电晕强度的行为有所不同,并且这种断裂发生在±45°的日射纬度上。即使可以找到同质的日冕数据集,也不能直接得出“倾斜角”,即使可以发现绿色的日冕孔,绿色的日冕中的极点分支与突起和倾斜角之间存在一些相似之处。

著录项

  • 来源
    《Solar Physics》 |2002年第1期|47-61|共15页
  • 作者

    V. Rušin; M. Rybansky;

  • 作者单位

    Astronomical Institute Slovak Academy of Sciences;

    Astronomical Institute Slovak Academy of Sciences;

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  • 正文语种 eng
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