Spectroscopic and Stereoscopic Observations of the Solar Jets
arXiv:1910.13649 · doi:10.3847/1538-4357/ab530c
Abstract
We present a comprehensive study of a series of recurrent jets that occurred at the periphery of the NOAA active region 12114 on 2014 July 7. These jets were found to share the same source region and exhibited rotational motions as they propagated outward. The multi-wavelength imaging observations made by the AIA and {\it IRIS} telescopes reveal that some of the jets contain cool plasma only, while some others contain not only cool but also hot plasma. The Doppler velocities calculated from the {\it IRIS} spectra show a continuous evolution from blue to red shifts as the jet motions change from upward to downward. Additionally, some jets exhibit opposite Doppler shifts on their both sides, indicative of rotating motions along their axes. The inclination angle and three-dimensional velocity of the largest jet were inferred from the imaging and spectroscopic observations, which show a high consistence with those derived from the stereoscopic analysis using dual-perspective observations by {\it SDO}/AIA and {\it STEREO}-B/EUVI. By relating the jets to the local UV/EUV and full-disk {\it GOES} X-ray emission enhancements, we found that the previous five small-scale jets were triggered by five bright points while the last/largest one was triggered by a C1.6 solar flare. Together with a number of type III radio bursts generated during the jet eruptions as well as a weak CME that was observed in association with the last jet, our observations provide evidences in support of multi-scale magnetic reconnection processes being responsible for the production of jet events.
15 pages, 8 figures, 1 table, 1 movie
References in corpus (19)
- Solar Coronal Jets: Observations, Theory, and Modeling
- Small-scale filament eruptions as the driver of solar coronal hole X-ray jets
- Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
- Jets in coronal holes: Hinode observations and 3D computer modelling
- Kinematics and Fine Structure of An Unwinding Polar Jet Observed by SDO/AIA
- Homologous Helical Jets: Observations by IRIS, SDO and Hinode and Magnetic Modeling with Data-Driven Simulations
- The Spectroscopic Signature of Quasi-periodic Upflows in Active Region Timeseries
- Blobs in recurring EUV jets
- Observations and Implications of Large-Amplitude Longitudinal Oscillations in a Solar Filament
- On a solar blowout jet: driven mechanism and the formation of cool and hot components
- A Time Series of Filament Eruptions Observed by Three Eyes from Space: From Failed to Successful Eruptions
- Magnetic Untwisting in Solar Jets that Go into the Outer Corona in Polar Coronal Holes
- Imaging and Spectroscopic Diagnostics on the Formation of Two Magnetic Flux Ropes Revealed by SDO/AIA and IRIS
- Round-trip Slipping Motion of the Circular Flare Ribbon Evidenced in a Fan-spine Jet
- Sunspot Waves and Triggering of Homologous Active Region Jets
- Successive Two-sided loop Jets Caused by Magnetic Reconnection between Two adjacent Filamentary Threads
- Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare
- Systematic variations of macrospicule properties observed by SDO/AIA over half a decade
- Undercover EUV Solar Jets Observed by the Interface Region Imaging Spectrograph