We present a multiwavelength analysis of two flare-related jets on 2014 November 13, using data from the Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA), the Reuven High Energy Solar Spectroscopic Imager (RHESSI), the Hinode/X-ray Telescope (XRT), and the Interface Region Imaging Spectrograph (IRIS). Unlike most coronal jets, where hard X-ray (HXR) emissions are usually observed near the jet base, in these events HXR emissions are found at several locations, including in the corona. We carry out the first differential emission measure analysis that combines both AIA (and XRT, when available) bandpass filter data and RHESSI HXR measurements for coronal jets, and obtain self-consistent results across a wide temperature range and into nonthermal energies. In both events, hot plasma first appears at the jet base, but as the base plasma gradually cools, hot plasma also appears near the jet top. Moreover, nonthermal electrons, while only mildly energetic, are found in multiple HXR locations and contain large amounts of total energy. In particular, the energetic electrons that produce the HXR sources at the jet top are accelerated near the top location, rather than traveling from a reconnection site at the jet base. This means that there is more than one particle acceleration site in each event. Jet velocities are consistent with previous studies, including the upward and downward velocities around ∼200 km s−1 and ∼100 km s−1, respectively, and fast outflows of 400-700 km s−1. We also examine the energy partition in the later event, and find that the nonthermal energy in the accelerated electrons is most significant compared to the other energy forms considered. We discuss the interpretations and provide constraints on the mechanisms for coronal jet formation.
|Original language||English (US)|
|State||Published - Feb 1 2023|
Bibliographical noteFunding Information:
This work is supported by NASA Heliophysics Guest Investigator grant 80NSSC20K0718. Y.Z. is also supported by the NASA FINESST program 80NSSC21K1387. N.K.P. acknowledges support from NASA’s SDO/AIA and HGI grants. We thank Samaiyah Farid for helpful discussions. We are also grateful to the SDO/AIA, RHESSI, Hinode/XRT, and IRIS teams for their open data policy. Hinode is a Japanese mission developed and launched by ISAS/JAXA, with NAOJ as domestic partner and NASA and STFC (UK) as international partners. It is operated by these agencies in cooperation with ESA and the NSC (Norway). IRIS is a NASA small explorer mission, developed and operated by LMSAL, with mission operations executed at the NASA Ames Research Center, and major contributions to downlink communications funded by ESA and the Norwegian Space Centre.
© 2023. The Author(s). Published by the American Astronomical Society.