Dynamics and plasma properties of an X-ray jet from SUMER, EIS, XRT and EUVI A & B simultaneous observations
arXiv:1008.3983 · doi:10.1051/0004-6361/201015269
Abstract
Small-scale transient phenomena in the quiet Sun are believed to play an important role in coronal heating and solar wind generation. One of them named as "X-ray jet" is the subject of our study. We indent to investigate the dynamics, evolution and physical properties of this phenomenon. We combine spatially and temporally multi-instrument observations obtained simultaneously with the SUMER spectrometer onboard SoHO, EIS and XRT onboard Hinode, and EUVI/SECCHI onboard the Ahead and Behind STEREO spacecrafts. We derive plasma parameters such as temperatures and densities as well as dynamics by using spectral lines formed in the temperature range from 10 000 K to 12 MK. We also use image difference technique to investigate the evolution of the complex structure of the studied phenomenon. With the available unique combination of data we were able to establish that the formation of a jet-like event is triggered by not one but several energy depositions which are most probably originating from magnetic reconnection. Each energy deposition is followed by the expulsion of pre-existing or new reconnected loops and/or collimated flow along open magnetic field lines. We derived in great detail the dynamic process of X-ray jet formation and evolution. We also found for the first time spectroscopically in the quiet Sun a temperature of 12~MK and density of 4 10^10~cm^-3 in a reconnection site. We raise an issue concerning an uncertainty in using the SUMER Mg X 624.9 A line for coronal diagnostics. We clearly identified two types of up-flow: one collimated up-flow along open magnetic field lines and a plasma cloud formed from the expelled BP loops. We also report a cooler down-flow along closed magnetic field lines. A comparison is made with a model developed by Moreno-Insertis \etal\ (2008).
15 pages, 15 figures
References in corpus (3)
Cited by in corpus (26)
- Solar Coronal Jets: Observations, Theory, and Modeling
- Plasma Jets and Eruptions in Solar Coronal Holes: a 3D flux emergence experiment
- Solar ultraviolet bursts
- Twisting solar coronal jet launched at the boundary of an active region
- Blobs in recurring EUV jets
- Solar Dynamics Observatory and Hinode observations of a blowout jet in a coronal hole
- A model for straight and helical solar jets: II. Parametric study of the plasma beta
- Multiwavelength study of twenty jets emanating from the periphery of active regions
- Coronal hole boundaries at small scales: III. EIS and SUMER views
- Can coronal hole spicules reach coronal temperatures?
- Physical properties of solar polar jets: A statistical study with Hinode XRT data
- Subarcsecond blobs in flare-related coronal jets
- Blowout Jets and Impulsive Eruptive Flare in a Bald-Patch Topology
- Magnetic Reconnection resulting from Flux Emergence: Implications for Jet Formation in the lower solar atmosphere?
- The dynamical behaviour of a jet in an on-disk coronal hole observed with AIA/SDO
- Kelvin-Helmholtz instability of kink waves in photospheric twisted flux tubes
- Characteristics of polar coronal hole jets
- On Modeling the Kelvin--Helmholtz Instability in Solar Atmosphere
- Temperature and Density Structure of a Recurring Active Region Jet
- Heating at the remote footpoints as a brake on jet flows along loops in the solar atmosphere
- Transverse oscillations in a coronal loop triggered by a jet
- What is the true nature of blinkers?
- Probing Upflowing Regions in the Quiet Sun and Coronal Holes
- Tracing magnetic switchbacks to their source: An assessment of solar coronal jets as switchback precursors
- Active region upflows: 1. Multi-instrument observations
- Velocity Structure and Temperature Dependence of Extreme-Ultraviolet Jet Observed by Hinode