QUIET-SUN Hα TRANSIENTS AND CORRESPONDING SMALL-SCALE TRANSITION REGION AND CORONAL HEATING

被引:38
|
作者
Henriques, V. M. J. [1 ]
Kuridze, D. [1 ]
Mathioudakis, M. [1 ]
Keenan, F. P. [1 ]
机构
[1] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland
来源
ASTROPHYSICAL JOURNAL | 2016年 / 820卷 / 02期
基金
英国科学技术设施理事会;
关键词
solar wind; Sun: activity; Sun: chromosphere; Sun: corona; Sun: general; Sun: transition region; SWEDISH SOLAR TELESCOPE; II SPICULES; IMAGING-SPECTROGRAPH; BLUESHIFTED EXCURSIONS; DISK COUNTERPARTS; TORSIONAL MOTIONS; FINE-STRUCTURE; CHROMOSPHERE; EVOLUTION; DYNAMICS;
D O I
10.3847/0004-637X/820/2/124
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Rapid blue- and redshifted excursions (RBEs and RREs) are likely to be the on-disk counterparts of Type II spicules. Recently, heating signatures from RBEs/RREs have been detected in IRIS slit-jaw images dominated by transition region (TR) lines around network patches. Additionally, signatures of Type II spicules have been observed in Atmospheric Imaging Assembly (AIA) diagnostics. The full-disk, ever-present nature of the AIA diagnostics should provide us with sufficient statistics to directly determine how important RBEs and RREs are to the heating of the TR and corona. We find, with high statistical significance, that at least 11% of the low coronal brightenings detected in a quiet-Sun region in He II 304 angstrom can be attributed to either RBEs or RREs as observed in Ha, and a 6% match of Fe IX 171 angstrom detected events to RBEs or RREs with very similar statistics for both types of Ha features. We took a statistical approach that allows for noisy detections in the coronal channels and provides us with a lower, but statistical significant, bound. Further, we consider matches based on overlapping features in both time and space, and find strong visual indications of further correspondence between coronal events and co-evolving but non-overlapping, RBEs and RREs.
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页数:9
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