We present a multi-wavelength analysis of two flare-related jets on November
13, 2014, using data from SDO/AIA, RHESSI, Hinode/XRT, and 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 (DEM)
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 non-thermal energies. In both
events, hot plasma first appeared at the jet base, but as the base plasma
gradually cooled, hot plasma also appeared near the jet top. Moreover,
non-thermal electrons, while only mildly energetic, are found in multiple HXR
locations and contain a large amount of total energy. Particularly, the
energetic electrons that produced the HXR sources at the jet top were
accelerated near the top location, rather than traveling from a reconnection
site at the jet base. This means that there was more than one particle
acceleration site in each event. Jet velocities are consistent with previous
studies, including upward and downward velocities around ~200 km/s and ~100
km/s respectively, and fast outflows of 400-700 km/s. We also examine the
energy partition in the later event, and find that the non-thermal energy in
accelerated electrons is most significant compared to other energy forms
considered. We discuss the interpretations and provide constraints on
mechanisms for coronal jet formation.
Preprint
Comment: 18 pages, 12 figures
Subject: Astrophysics - Solar and Stellar Astrophysics