Statistical research of the umbral and penumbral oscillations

Zhou, Xinping; Hu, Liang; Li, Qiu-Huan; Zhang, WenJia; OuYang, WenHui

doi:10.1016/j.newast.2016.08.007

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Moreover, the 12 mHz component exists only inside the umbra. Besides, Zhou et al (2017aZhou et al ( , 2017b [20] [21] found that the period of the running waves within the umbra is half of that within the penumbra. The former is a typical 3-min oscillation with a period of 156 s and the latter is a typical 5-min oscillation with a period of 312 s.…”

Section: Umbral Dot Penumbral Wavementioning

confidence: 99%

Research progress based on observations of the New Vacuum Solar Telescope

Yan

Liu

Zhang

et al. 2019

Preprint

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The purpose of this paper is to introduce the main scientific results made by the one-meter New Vacuum Solar Telescope (NVST), which was put into commission on 2010. NVST is one of the large aperture solar telescopes in the world, located on the shore of Fuxian lake of Yunnan province in China, aiming at serving solar physicists by providing them with high resolution photospheric and chromospheric observational data. Based on the data from NVST and complementary observations from space (e.g., Hinode, SDO and IRIS, etc), dozens of scientific papers have been published with a wide range of topics concentrating mainly on dynamics and activities of fine-scale magnetic structures and their roles in the eruptions of active-region filaments and flares. The achievements include dynamic characteristics of photospheric bright points, umbral dots, penumbral waves, and sunspot/light bridge oscillation, observational evidence of small-scale magnetic reconnection, and fine-scale dynamic structure of prominences. All these new results will shed light on the better understanding of solar eruptive activities. Data release, observation proposals, and future research subjects are introduced and discussed.

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Section: Umbral Dot Penumbral Wavementioning

confidence: 99%

Research progress based on observations of the New Vacuum Solar Telescope

Yan

Liu

Zhang

et al. 2019

Preprint

View full text Add to dashboard Cite

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The relationship between the 5-min oscillation and 3-min oscillations at the umbral/penumbral sunspot boundary

Zhou

Liang

2017

Astrophys Space Sci

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CME-Driven and Flare-Ignited Fast Magnetosonic Waves Detected in a Solar Eruption

Zhou

Shen

et al. 2021

Sol Phys

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We present Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA) observation of three types of fast-mode, propagating, magnetosonic waves in a GOES C3.0 flare on 23 April 2013, which was accompanied by a prominence eruption and a broad coronal mass ejection (CME). During the fast-rising phase of the prominence, a large-scale, dome-shaped, extreme-ultraviolet (EUV) wave firstly formed ahead of the CME bubble and propagated at a speed of about 430 km s −1 in the CME's lateral direction. One can identify the separation process of the EUV wave from the CME bubble. The reflection effect of the on-disk counterpart of this EUV wave was also observed when it interacted with a remote active region. Six minutes after the first appearance of the EUV wave, a large-scale, quasi-periodic EUV train with a period of about 120 seconds, which emanated from the flare epicenter and propagated outward at an average speed up to 1100 km s −1 , appeared inside the CME bubble. In addition, another narrow, quasi-periodic EUV wave train, which also emanated from the flare epicenter, propagated at a speed of about 475 km s −1 and with a period of about 110 seconds, was observed along a closed-loop system connecting two adjacent active regions. We propose that all of the observed waves are fast-mode magnetosonic waves, in which the large-scale, dome-shaped EUV wave ahead of the CME bubble was driven by the expansion of the CME bubble, while the large-scale, quasi-periodic EUV train within the CME bubble and the narrow quasi-periodic EUV wave train along the closedloop system were excited by the intermittent energy-releasing process in the flare. Coronal seismology application and energy carried by the waves are also estimated based on the measured wave parameters.

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Statistical research of the umbral and penumbral oscillations

Cited by 5 publications

References 14 publications

Research progress based on observations of the New Vacuum Solar Telescope

Research progress based on observations of the New Vacuum Solar Telescope

The relationship between the 5-min oscillation and 3-min oscillations at the umbral/penumbral sunspot boundary

CME-Driven and Flare-Ignited Fast Magnetosonic Waves Detected in a Solar Eruption

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