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ARE IRIS BOMBS CONNECTED TO ELLERMAN BOMBS?
Tian, Hui1,2; Xu Z(徐稚)3; He, Jiansen1; Madsen, Chad4,5; Tian, H
发表期刊ASTROPHYSICAL JOURNAL
2016-06-20
卷号824期号:2
DOI10.3847/0004-637X/824/2/96
产权排序第3完成单位
收录类别SCI
关键词Line: Profiles Magnetic Reconnection Sun: Chromosphere Sun: Photosphere Sun: Transition Region
摘要Recent observations by the Interface Region Imaging Spectrograph (IRIS) have revealed pockets of hot gas (similar to 2-8 x 10(4) K) potentially resulting from magnetic reconnection in the partially ionized lower solar atmosphere (IRIS bombs; IBs). Using joint observations between IRIS and the Chinese New Vacuum Solar Telescope, we have identified 10 IBs. We find that 3 are unambiguously and 3 others are possibly connected to Ellerman bombs (EBs), which show intense brightening of the extended H-alpha wings without leaving an obvious signature in the H-alpha core. These bombs generally reveal the following distinct properties: (1) the OIV 1401.156 angstrom and 1399.774 angstrom lines are absent or very weak; (2) the Mn I 2795.640 angstrom line manifests as an absorption feature superimposed on the greatly enhanced Mg II k line wing; (3) the Mg II k and h lines show intense brightening in the wings and no dramatic enhancement in the cores; (4) chromospheric absorption lines such as Ni II 1393.330 angstrom and 1335.203 angstrom are very strong; and (5) the 1700 angstrom images obtained with the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory reveal intense and compact brightenings. These properties support the formation of these bombs in the photosphere, demonstrating that EBs can be heated much more efficiently than previously thought. We also demonstrate that the Mg II k and h lines can be used to investigate EBs similarly to H-alpha, which opens a promising new window for EB studies. The remaining four IBs obviously have no connection to EBs and they do not have the properties mentioned above, suggesting a higher formation layer, possibly in the chromosphere.
项目资助者ESA ; Norwegian Space Centre ; Recruitment Program of Global Experts of China, NSFC(41574166, 11473064, 41574168, 41231069) ; LMSAL(8100002705)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000381912800032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]REGION-IMAGING-SPECTROGRAPH ; DYNAMICS-OBSERVATORY SDO ; SOLAR TRANSITION REGION ; EXPLOSIVE EVENTS ; MAGNETIC RECONNECTION ; H-ALPHA ; HYDROGEN-BOMBS ; O-IV ; ATMOSPHERE ; TELESCOPE
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被引频次:31[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9688
专题抚仙湖太阳观测站
通讯作者Tian, H
作者单位1.School of Earth and Space Sciences, Peking University, Beijing 100871, China
2.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China
3.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
4.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
5.Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
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Tian, Hui,Xu Z,He, Jiansen,et al. ARE IRIS BOMBS CONNECTED TO ELLERMAN BOMBS?[J]. ASTROPHYSICAL JOURNAL,2016,824(2).
APA Tian, Hui,Xu Z,He, Jiansen,Madsen, Chad,&Tian, H.(2016).ARE IRIS BOMBS CONNECTED TO ELLERMAN BOMBS?.ASTROPHYSICAL JOURNAL,824(2).
MLA Tian, Hui,et al."ARE IRIS BOMBS CONNECTED TO ELLERMAN BOMBS?".ASTROPHYSICAL JOURNAL 824.2(2016).
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