观测 8 个月来太阳全球日冕磁场的演变。

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-10-04 Epub Date: 2024-10-03 DOI:10.1126/science.ado2993

Zihao Yang, Hui Tian, Steven Tomczyk, Xianyu Liu, Sarah Gibson, Richard J Morton, Cooper Downs

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引用次数: 0

摘要

日冕磁场储存的能量可以释放出来加热等离子体，推动太阳爆发。对全球日冕磁场的测量仅限于几个快照。在这项工作中，我们利用升级版日冕多通道极化计进行了观测，提供了日缘上方全球日冕的 114 幅磁图，时间跨度约为 8 个月。我们确定了日冕中磁场随高度的分布情况，并监测了多次太阳公转过程中不同纬度的演变情况。在 1.05 至 1.60 太阳半径之间的磁场强度变化从

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Observing the evolution of the Sun's global coronal magnetic field over 8 months.

The magnetic field in the Sun's corona stores energy that can be released to heat plasma and drive solar eruptions. Measurements of the global coronal magnetic field have been limited to several snapshots. In this work, we present observations, using the Upgraded Coronal Multi-channel Polarimeter, that provide 114 magnetograms of the global corona above the solar limb spanning ~8 months. We determined the magnetic field distribution with altitude in the corona and monitored the evolution at different latitudes over multiple solar rotations. The field strength between 1.05 and 1.60 solar radii varies from <1 to ~20 gauss. A signature of active longitudes appears in the coronal magnetic field measurements. Coronal models are generally consistent with our observations, though they have larger discrepancies in high-latitude regions.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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