000007702 001__ 7702
000007702 005__ 20260105155514.0
000007702 0247_ $$2DOI$$a10.3847/1538-4357/ae0d90
000007702 037__ $$aSCART-2026-0010
000007702 100__ $$aPanesar, Navdeep K.
000007702 245__ $$aBuildup, Explosion, and Untwisting of a Solar Active Region Jet Observed with Solar Orbiter, IRIS, and SDO
000007702 260__ $$c2025
000007702 520__ $$aWe present detailed analysis of an active region coronal jet accompanying a minifilament eruption that is fully captured and well resolved in high spatial resolution 174 Å coronal images from Solar Orbiter’s Extreme Ultraviolet Imager (EUI). The active region jet is simultaneously observed by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory. An erupting minifilament is rooted at the edge of an active region where mixed-polarity magnetic flux is present. Minority-polarity positive flux merges and cancels with the active region’s dominant negative flux at an average rate of 1019 Mx hr−1, building a minifilament-holding flux rope and triggering its eruption. The eruption shows a slow rise followed by a fast rise, akin to large-scale filament eruptions. EUI images and Mg II k spectra, displaying simultaneously blueshift and redshift at the opposite edges of the spire, indicate counterclockwise untwisting of the jet spire. This jet is the clearest, most comprehensively observed active-region jet with this instrument set, displaying striking similarities with quiet Sun and coronal hole jets. Its magnetic (≤1028 erg), thermal (1025 erg), and kinetic (1025 erg) energies suggest a significant contribution to local coronal heating. We conclude that magnetic flux cancelation builds a minifilament-carrying twisted flux rope and also eventually triggers the flux rope’s eruption that makes the coronal jet, in line with our recent results on the buildup and explosion of solar coronal jets in quiet Sun and coronal holes. That is, this active region jet clearly works the same way as the vast majority of quiet Sun and coronal hole jets.
000007702 594__ $$aSTCE
000007702 6531_ $$aSolar Orbiter
000007702 6531_ $$aEUI
000007702 6531_ $$ajet
000007702 700__ $$aSterling, Alphonse C.
000007702 700__ $$aMoore, Ronald L.
000007702 700__ $$aTiwari, Sanjiv K. 
000007702 700__ $$aBerghmans, David
000007702 700__ $$aZhukov, Andrei
000007702 700__ $$aMierla, Marilena
000007702 700__ $$aVerbeeck, Cis
000007702 700__ $$aStegen, Koen
000007702 773__ $$n2, id.164$$pThe Astrophysical Journal Letters,$$v994$$y2025
000007702 8560_ $$fdavid.berghmans@ksb-orb.be
000007702 85642 $$ahttps://arxiv.org/abs/2510.05439
000007702 85642 $$ahttps://iopscience.iop.org/article/10.3847/1538-4357/ae0d90
000007702 905__ $$apublished in
000007702 980__ $$aREFERD