High-resolution He I 10 830 Å narrowband imaging for precursors of chromospheric jets and their quasi-periodic properties
Document Type
Article
Publication Date
4-1-2023
Abstract
Solar jets are well-collimated plasma ejections in the solar atmosphere. They are prevalent in active regions, the quiet Sun, and even coronal holes. They display a range of temperatures, yet the nature of the cool components has not been fully investigated. In this paper, we show the existence of the precursors and quasi-periodic properties for two chromospheric jets, mainly utilizing the He I 10 830 Å narrowband filtergrams taken by the Goode Solar Telescope (GST). The extreme ultraviolet (EUV) counterparts present during the eruption correspond to a blowout jet (jet 1) and a standard jet (jet 2), as observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamic Observatory (SDO). The high-resolution He I 10 830 Å observation captures a long-lasting precursor for jet 1, signified by a series of cool ejections. They are recurrent jet-like features with a quasi-period of about five minutes. On the other hand, the cool components of jet 2, recurrently accompanied by EUV emissions, present a quasi-periodic behavior with a period of about five minutes. Both the EUV brightening and He I 10 830 Å absorption show that there was a precursor for jet 2 that occurred about five minutes before its onset. We propose that the precursor of jet 1 may be the consequence of chromospheric shock waves, since the five-minute oscillation from the photosphere can leak into the chromosphere and develop into shocks. Then, we find that the quasi-periodic behavior of the cool components of jet 2 may be related to magnetic reconnections modulated by the oscillation in the photosphere.
Identifier
85156203200 (Scopus)
Publication Title
Astronomy and Astrophysics
External Full Text Location
https://doi.org/10.1051/0004-6361/202244607
e-ISSN
14320746
ISSN
00046361
Volume
672
Grant
AST-2108235
Fund Ref
Anglo-Israel Association
Recommended Citation
Wang, Ya; Zhang, Qingmin; Hong, Zhenxiang; Shen, Jinhua; Ji, Haisheng; and Cao, Wenda, "High-resolution He I 10 830 Å narrowband imaging for precursors of chromospheric jets and their quasi-periodic properties" (2023). Faculty Publications. 1814.
https://digitalcommons.njit.edu/fac_pubs/1814
