A Solar Blowout Jet Caused by the Eruption of a Magnetic Flux Rope

A Solar Blowout Jet Caused by the Eruption of a Magnetic Flux Rope

We investigate the three-dimensional (3D) magnetic structure of a blowout jet originating in the western edge of NOAA active region (AR) 11513 on 2012 July 2 by means of recently developed forced field extrapolation model. The results show that the blowout jet was caused by the eruption of the magne...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2017-08, Vol.844 (2), p.L20
Main Authors: Zhu, Xiaoshuai, Wang, Huaning, Cheng, Xin, Huang, Chong
Format: Article
Language:eng
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BLOWOUTS
CHROMOSPHERE
ERUPTION
Eruptions
EXTRAPOLATION
Instability
JETS
KINK INSTABILITY
MAGNETIC FIELDS
MAGNETIC FLUX
Magnetic structure
Magnetism
SOLAR CORONA
Stability
Sun: activity
Sun: chromosphere
Sun: corona
Sun: magnetic fields
THREE-DIMENSIONAL LATTICES
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Summary:We investigate the three-dimensional (3D) magnetic structure of a blowout jet originating in the western edge of NOAA active region (AR) 11513 on 2012 July 2 by means of recently developed forced field extrapolation model. The results show that the blowout jet was caused by the eruption of the magnetic flux rope (MFR) consisting of twisted field lines. We further calculate the twist number and squashing factor Q of the reconstructed magnetic field and find that (1) the MFR corresponds well with the high region, and (2) the MFR outer boundary corresponds well with the high Q region, probably interpreting the bright structure at the base of the jet. The twist number of the MFR is estimated to be . Thus, the kink instability is regarded as the initiation mechanism of the blowout jet as reaches or even exceeds the threshold value of the kink instability. Our results also indicate that the bright point at the decaying phase is actually composed of some small loops that are heated by the reconnection occurring above. In summary, the blowout jet is mostly consistent with the scenario proposed by Moore et al., except that the kink instability is found to be a possible trigger.
ISSN:2041-8205
2041-8213