Spectroscopic observation of a transition region network jet
arXiv:2202.11375 · doi:10.1051/0004-6361/202142995
Abstract
Ubiquitous transition region (TR) network jets are considered to be substantial sources of mass and energy to the corona and solar wind. We conduct a case study of a network jet to better understand the nature of mass flows along its length and the energetics involved in its launch. We present an observation of a jet with the Interface Region Imaging Spectrograph (IRIS), while also using data from the Solar Dynamics Observatory (SDO) to provide further context. The jet was located within a coronal hole close to the disk center. We find that a blueshifted secondary component of TR emission is associated with the jet and is persistent along its spire. This component exhibits upward speeds of approximately 20-70 km s and shows enhanced line broadening. However, plasma associated with the jet in the upper chromosphere shows downflows of 5-10 km s. Finally, the jet emanates from a seemingly unipolar magnetic footpoint. While a definitive magnetic driver is not discernible for this event, we infer that the energy driving the network jet is deposited at the top of the chromosphere, indicating that TR network jets are driven from the mid-atmospheric layers of the Sun. The energy flux associated with the line broadening indicates that the jet could be powered all the way into the solar wind.
arXiv comment9 pages, 7 figures. Accepted for publication in A&A
References in corpus (28)
- The Interface Region Imaging Spectrograph (IRIS)
- Solar Coronal Jets: Observations, Theory, and Modeling
- Hot Explosions in the Cool Atmosphere of the Sun
- Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
- Sunrise: instrument, mission, data and first results
- The formation of IRIS diagnostics II. The formation of the Mg II h&k lines in the solar atmosphere
- On the prevalence of small-scale twist in the solar chromosphere and transition region
- The second flight of the SUNRISE balloon-borne solar observatory: overview of instrument updates, the flight, the data and first results
- The formation of IRIS diagnostics. III. Near-ultraviolet Spectra and Images
- Magnetic Flux Cancellation as the Trigger of Solar Quiet-Region Coronal Jets
- On red shifs in the transition region and corona
- Two components of the coronal emission revealed by EUV spectroscopic observations
- Magnetic Flux Cancelation as the Trigger of Solar Coronal-Hole Coronal Jets
- Why Is Non-thermal Line Broadening of Spectral Lines in The Lower Transition Region of the Sun Independent of Spatial Resolution?
- Solar Coronal Loops Associated with Small-scale Mixed Polarity Surface Magnetic Fields
- Heating signatures in the disk counterparts of solar spicules in IRIS observations
- Compact solar UV burst triggered in a magnetic field with a fan-spine topology
- Plasmoid-mediated reconnection in solar UV bursts
- What causes the high apparent speeds in chromospheric and transition region spicules on the Sun?
- Magnetic Flux Cancellation as the Trigger Mechanism of Solar Coronal Jets
- Statistical study of network jets observed in the solar transition region: A comparison between coronal holes and quiet sun regions
- Investigating the Transition Region Explosive Events and Their Relationship to Network Jets
- Rotating Network Jets in the quiet Sun as Observed by IRIS
- Bridging the Gap: Capturing the Ly Counterpart of a Type-II Spicule and its Heating Evolution with VAULT2.0 and IRIS Observations
- On the relation between transition region network jets and coronal plumes
- Energetics of magnetic transients in a solar active region plage
- Evidence of multithermal nature of spicular downflows. Impact on solar atmospheric heating
- Widespread Occurrence of High-Velocity Upflows in Solar Active Regions