太阳黑子本影振荡在水平和垂直方向上的传播特性

IF 4.8 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Astrophysical Journal Pub Date : 2023-11-01 DOI:10.3847/1538-4357/acf457
Wei Wu, Jiang-tao Su, Jie Chen, Xiao-shuai Zhu, Robert Sych
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引用次数: 0

摘要

摘要对太阳黑子本影振荡的传播特性进行了研究。在具有4个本影的太阳黑子1(位于NOAA ar12127)上,分析表明不同本影的振荡具有相关性。弱相关性(<20%)是由于本影振荡在水平方向上跨越本影边界向相邻本影传播。我们推测,两个保护膜的振荡在亚光球中有一个共同的起源,导致更强的相关性(>30%)。此外,利用BBSO/GST提供的TiO(光球)、H α(色球)图像,以及太阳动力学观测台(SDO)大气成像组件获取的304 Å(上色球和下过渡区)、171 Å(上过渡区)、193 Å(日冕)和211 Å(活动区日冕)图像,分析了黑子本影中振荡的垂直传播。多通道观测表明,在太阳黑子1低层大气中观测到的本影振荡在高层大气中无法探测到。然而,在太阳黑子2(位于NOAA ar12132)中,低层大气的振荡可以传播到高层大气。利用SDO上的日震和磁成像仪提供的光球磁场数据,对两个太阳黑子磁场的势场外推表明,开放的磁场结构允许太阳黑子振荡传播到更高的高度,而封闭的磁场结构则不能。
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Propagation Properties of Sunspots Umbral Oscillations in Horizontal and Vertical Directions
Abstract We present a study on investigating the propagation characteristics of umbral oscillations in sunspots. In sunspot 1 (located in NOAA AR 12127) with four umbrae, the analysis shows that the oscillations in different umbrae are correlated. The weak correlation (<20%) is attributed to the propagation of umbral oscillations across the umbral boundary to its adjacent umbra in the horizontal direction. We speculate that oscillations in two of the umbrae have a common origin in the sub-photosphere, resulting in a stronger correlation (>30%). Additionally, utilizing the TiO (photosphere), H α (chromosphere) images provided by BBSO/GST, and the 304 Å (upper chromosphere and lower transition region), 171 Å (upper transition region), 193 Å (corona), and 211 Å (active region corona) images acquired by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory (SDO), we analyze the vertical propagation of oscillations in the sunspot umbra. Multi-channel observation shows that the umbral oscillations observed in the lower atmosphere of sunspot 1 cannot be detected in the upper atmosphere. However, in sunspot 2 (located in NOAA AR 12132), oscillations in the lower atmosphere can propagate to the upper atmosphere. Using photospheric magnetic field data provided by the Helioseismic and Magnetic Imager on board SDO, potential field extrapolation of the magnetic field for the two sunspots shows that open magnetic field structures allow sunspot oscillations to propagate to higher heights, while closed magnetic field structures do not.
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来源期刊
Astrophysical Journal
Astrophysical Journal 地学天文-天文与天体物理
CiteScore
8.40
自引率
30.60%
发文量
2854
审稿时长
1 months
期刊介绍: The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
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