Persistent Upflows and Downflows at Active Region Boundaries Observed by SUTRI and AIA

doi:10.3847/1538-4357/ad3358

	Persistent Upflows and Downflows at Active Region Boundaries Observed by SUTRI and AIA
	Wu, Yuchuan 4,5; Hou, Zhenyong 3; Li, Wenxian 2,5; Bai, Xianyong 2,4,5; Song, Yongliang 2,5; Yang, Xiao 2,5; Hu, Ziyao 4,5; Deng, Yuanyong 2,4,5; Ji KF(季凯帆)1
刊名	ASTROPHYSICAL JOURNAL
	2024-04-01
卷号	965 期号:2
ISSN号	0004-637X
DOI	10.3847/1538-4357/ad3358
产权排序	第5完成单位
文献子类	Article
英文摘要	Upflows and downflows at active region (AR) boundaries have been frequently observed with spectroscopic observations at extreme ultraviolet passbands. In this paper, we report the coexistence of upflows and downflows at the AR boundaries with imaging observations from the Solar Upper Transition Region Imager (SUTRI) and the Atmospheric Imaging Assembly (AIA). With their observations from 2022 September 21 to 2022 September 30, we find 17 persistent opposite flows occurring along the AR coronal loops. The upflows are prominent in the AIA 193 angstrom images with a velocity of 50-200 km s-1, while the downflows are best seen in the SUTRI 465 angstrom and AIA 131 angstrom images with a slower velocity of tens of kilometers per second (characteristic temperatures (log T(K)) for 193, 465, and 131 angstrom are 6.2, 5.7, and 5.6, respectively). We also analyze the center-to-limb variation of the velocities for both upflows and downflows. The simultaneous observations of downflows and upflows can be explained by the chromosphere-corona mass-cycling process, in which the localized chromospheric plasma is impulsively heated to coronal temperature forming a upflow and then these upflows experience radiative cooling producing a downflow with the previously heated plasma returning to the lower atmosphere. In particular, the persistent downflows seen by SUTRI provide strong evidence of the cooling process in the mass cycle. For upflows associated with open loops, part of the plasma is able to escape outward and into the heliosphere as solar wind.
学科主题	天文学 ; 天文学:太阳与太阳系
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	Strategic Priority Research Program of the Chinese Academy of Scienceshttps://doi.org/10.13039/501100012166[XDB0560000]; Strategic Priority Research Program of the Chinese Academy of Sciences[2023061]; Youth Innovation Promotion Association CAS[12373115]; National Natural Science Foundation of China (NSFC)[12303057]; NSFC[2021M700246]; China Postdoctoral Science Foundation; Precision Mechanics of CAS; Innovation Academy for Microsatellites of CAS
WOS关键词	TO-LIMB VARIATION ; PROPAGATING DISTURBANCES ; MAGNETIC RECONNECTION ; MAGNETOACOUSTIC WAVES ; IMAGING SPECTROMETER ; DOPPLER SHIFTS ; CORONAL HOLES ; SOLAR-WIND ; QUIET SUN ; OUTFLOWS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001201276500001
资助机构	Strategic Priority Research Program of the Chinese Academy of Scienceshttps://doi.org/10.13039/501100012166[XDB0560000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[2023061] ; Youth Innovation Promotion Association CAS[12373115] ; National Natural Science Foundation of China (NSFC)[12303057] ; NSFC[2021M700246] ; China Postdoctoral Science Foundation ; Precision Mechanics of CAS ; Innovation Academy for Microsatellites of CAS
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/27053]
专题	天文技术实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China 2.Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, People's Republic of China; 3.School of Earth and Space Sciences, Peking University, Beijing 100871, People's Republic of China; zhenyonghou@pku.edu.cn; 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 5.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; xybai@bao.ac.cn;
推荐引用方式 GB/T 7714	Wu, Yuchuan,Hou, Zhenyong,Li, Wenxian,et al. Persistent Upflows and Downflows at Active Region Boundaries Observed by SUTRI and AIA[J]. ASTROPHYSICAL JOURNAL,2024,965(2).
APA	Wu, Yuchuan.,Hou, Zhenyong.,Li, Wenxian.,Bai, Xianyong.,Song, Yongliang.,...&季凯帆.(2024).Persistent Upflows and Downflows at Active Region Boundaries Observed by SUTRI and AIA.ASTROPHYSICAL JOURNAL,965(2).
MLA	Wu, Yuchuan,et al."Persistent Upflows and Downflows at Active Region Boundaries Observed by SUTRI and AIA".ASTROPHYSICAL JOURNAL 965.2(2024).