Formation of an Active Region Filament Driven by a Series of Jets

Jincheng Wang, Xiaoli Yan, Zhongquan Qu, Satoru Ueno, Kiyoshi Ichimoto, Linhua Deng, Wenda Cao, Zhong Liu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present a formation process of a filament in active region NOAA 12574 during the period from 2016 August 11 to 12. Combining the observations of the Global Oscillation Network Group Hα, the Hida spectrum, and the Solar Dynamics Observatory/AIA 304 A, the formation process of the filament is studied. It is found that cool material (T ∼ 104 K) is ejected by a series of jets originating from the western footpoint of the filament. Simultaneously, the magnetic flux emerged from the photosphere in the vicinity of the western footpoint of the filament. These observations suggest that cool material in the low atmosphere can be directly injected into the upper atmosphere and the jets are triggered by the magnetic reconnection between pre-existing magnetic fields and new emerging magnetic fields. A detailed study of a jet at 18:02 UT on August 11 with GST/BBSO TiO observations revealed that some dark threads appeared in the vicinity of the western footpoint after the jet and the projection velocity of plasma along the filament axis was about 162.6 -5.4 km s-1. Using these observations of the Domeless Solar Telescope/Hida, we find that the injected plasma by a jet at 00:42 UT on August 12 was rotating. Therefore, we conclude that the jets not only supplied the material for the filament, but also injected the helicity into the filament simultaneously. Comparing the quantity of mass injection by the jets with the mass of the filament, we conclude that the estimated mass loading by the jets is sufficient to account for the mass in the filament.

Original languageEnglish (US)
Article number180
JournalAstrophysical Journal
Volume863
Issue number2
DOIs
StatePublished - Aug 20 2018

Fingerprint

filaments
magnetic field
plasma
helioseismology
lower atmosphere
upper atmosphere
threads
photosphere
magnetic fields
magnetic flux
observatory
emerging
oscillation
observatories
projection
telescopes
injection
atmosphere
oscillations
material

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: activity
  • Sun: evolution
  • Sun: filaments
  • prominences

Cite this

Wang, J., Yan, X., Qu, Z., Ueno, S., Ichimoto, K., Deng, L., ... Liu, Z. (2018). Formation of an Active Region Filament Driven by a Series of Jets. Astrophysical Journal, 863(2), [180]. https://doi.org/10.3847/1538-4357/aad187
Wang, Jincheng ; Yan, Xiaoli ; Qu, Zhongquan ; Ueno, Satoru ; Ichimoto, Kiyoshi ; Deng, Linhua ; Cao, Wenda ; Liu, Zhong. / Formation of an Active Region Filament Driven by a Series of Jets. In: Astrophysical Journal. 2018 ; Vol. 863, No. 2.
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Wang, J, Yan, X, Qu, Z, Ueno, S, Ichimoto, K, Deng, L, Cao, W & Liu, Z 2018, 'Formation of an Active Region Filament Driven by a Series of Jets', Astrophysical Journal, vol. 863, no. 2, 180. https://doi.org/10.3847/1538-4357/aad187

Formation of an Active Region Filament Driven by a Series of Jets. / Wang, Jincheng; Yan, Xiaoli; Qu, Zhongquan; Ueno, Satoru; Ichimoto, Kiyoshi; Deng, Linhua; Cao, Wenda; Liu, Zhong.

In: Astrophysical Journal, Vol. 863, No. 2, 180, 20.08.2018.

Research output: Contribution to journalArticle

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T1 - Formation of an Active Region Filament Driven by a Series of Jets

AU - Wang, Jincheng

AU - Yan, Xiaoli

AU - Qu, Zhongquan

AU - Ueno, Satoru

AU - Ichimoto, Kiyoshi

AU - Deng, Linhua

AU - Cao, Wenda

AU - Liu, Zhong

PY - 2018/8/20

Y1 - 2018/8/20

N2 - We present a formation process of a filament in active region NOAA 12574 during the period from 2016 August 11 to 12. Combining the observations of the Global Oscillation Network Group Hα, the Hida spectrum, and the Solar Dynamics Observatory/AIA 304 A, the formation process of the filament is studied. It is found that cool material (T ∼ 104 K) is ejected by a series of jets originating from the western footpoint of the filament. Simultaneously, the magnetic flux emerged from the photosphere in the vicinity of the western footpoint of the filament. These observations suggest that cool material in the low atmosphere can be directly injected into the upper atmosphere and the jets are triggered by the magnetic reconnection between pre-existing magnetic fields and new emerging magnetic fields. A detailed study of a jet at 18:02 UT on August 11 with GST/BBSO TiO observations revealed that some dark threads appeared in the vicinity of the western footpoint after the jet and the projection velocity of plasma along the filament axis was about 162.6 -5.4 km s-1. Using these observations of the Domeless Solar Telescope/Hida, we find that the injected plasma by a jet at 00:42 UT on August 12 was rotating. Therefore, we conclude that the jets not only supplied the material for the filament, but also injected the helicity into the filament simultaneously. Comparing the quantity of mass injection by the jets with the mass of the filament, we conclude that the estimated mass loading by the jets is sufficient to account for the mass in the filament.

AB - We present a formation process of a filament in active region NOAA 12574 during the period from 2016 August 11 to 12. Combining the observations of the Global Oscillation Network Group Hα, the Hida spectrum, and the Solar Dynamics Observatory/AIA 304 A, the formation process of the filament is studied. It is found that cool material (T ∼ 104 K) is ejected by a series of jets originating from the western footpoint of the filament. Simultaneously, the magnetic flux emerged from the photosphere in the vicinity of the western footpoint of the filament. These observations suggest that cool material in the low atmosphere can be directly injected into the upper atmosphere and the jets are triggered by the magnetic reconnection between pre-existing magnetic fields and new emerging magnetic fields. A detailed study of a jet at 18:02 UT on August 11 with GST/BBSO TiO observations revealed that some dark threads appeared in the vicinity of the western footpoint after the jet and the projection velocity of plasma along the filament axis was about 162.6 -5.4 km s-1. Using these observations of the Domeless Solar Telescope/Hida, we find that the injected plasma by a jet at 00:42 UT on August 12 was rotating. Therefore, we conclude that the jets not only supplied the material for the filament, but also injected the helicity into the filament simultaneously. Comparing the quantity of mass injection by the jets with the mass of the filament, we conclude that the estimated mass loading by the jets is sufficient to account for the mass in the filament.

KW - Sun: activity

KW - Sun: evolution

KW - Sun: filaments

KW - prominences

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Wang J, Yan X, Qu Z, Ueno S, Ichimoto K, Deng L et al. Formation of an Active Region Filament Driven by a Series of Jets. Astrophysical Journal. 2018 Aug 20;863(2). 180. https://doi.org/10.3847/1538-4357/aad187