Subarcsecond Blobs in Flare-related Coronal Jets

In this paper, we report multiwavelength observations of subarcsecond blobs in coronal jets. In AR 12149, a C5.5 circular-ribbon flare occurred at ∼04:55 UT on 2014 August 24, which consisted of a discrete circular ribbon and a short inner ribbon inside. Two jets (jet1 and jet2) were related to the...

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Bibliographic Details
Published in:The Astrophysical journal 2019-01, Vol.870 (2), p.113
Main Authors: Zhang, Q. M., Ni, L.
Format: Article
Language:English
Subjects:
Astrophysics
Closed loops
Coronal loops
Current sheets
Deceleration
Jets
Solar activity
Solar observatories
Spacecraft
Sun: corona
Sun: flares
Sun: magnetic fields
Sun: UV radiation
Wave propagation
Wavelengths
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Summary:In this paper, we report multiwavelength observations of subarcsecond blobs in coronal jets. In AR 12149, a C5.5 circular-ribbon flare occurred at ∼04:55 UT on 2014 August 24, which consisted of a discrete circular ribbon and a short inner ribbon inside. Two jets (jet1 and jet2) were related to the flare. Jet1 appeared first and experienced untwisting motion during its early propagation along a closed coronal loop. Jet2 appeared 6 minutes later and propagated upward along another closed loop. During its initial phase, a big plasmoid was ejected out of jet2 at a speed of ∼150 km s−1. After the flare peak time (05:02 UT), multiple bright and compact blobs appeared in the lower part of jet2, which were observed by the Slit-Jaw Imager (SJI) on board the Interface Region Imaging Spectrograph. The blobs observed by SJI in 1330 have sizes of 0 45-1 35, nearly 84% of which are subarcsecond (
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aaf391