On the Response of the Transition Region and the Corona to Rapid Excursions in the Chromosphere
arXiv:2408.04341 · doi:10.3847/1538-4357/ad50d5
Abstract
Spicules are the thin hair/grass-like structures that are prominently observed at the chromospheric solar limb. It is believed that fibrils and rapid blueshifted and redshifted excursions (RBEs and RREs; collectively referred to as REs) correspond to on-disk counterparts of type I spicules and type II spicules, respectively. Our investigation focuses on observing the response of these REs alongside similar spectral features in the chromosphere, transition Region (TR), and corona, utilizing space-time plots derived from coordinated observations from Swedish 1 m Solar Telescope/Hα, Interface Region Imaging Spectrograph (IRIS), and Solar Dynamics Observatory. Our analysis reveals upflowing REs, promptly reaching temperatures characteristic of the TR and corona, indicating a multi-thermal nature. Similarly, downflowing features exhibiting similar spectral signatures over the disk display plasma motion from the corona to chromospheric temperatures, demonstrating a multithermal nature. In addition to distinct upflows and downflows, we observe sequential upflow and downflow along the same path, depicting a distinctive parabolic trajectory in space-time plots of observations sampling TR and various coronal passbands. Similar to isolated upflows and downflows, these REs also exhibit a multi-thermal nature throughout their trajectory. Furthermore, our results reveal a more intricate motion of the REs in which both upflow and downflow coexist at the same spatial location. On a different note, our analysis, utilizing coordinated IRIS spectral observations, shows spatio-temporal redshifts/downflows in both the TR and chromosphere, suggesting that at least subsets of the strong redshifts/downflows observed in TR temperature spectra result from the return from the upper atmosphere flow of plasma in the form of bundles of spicules or features exhibiting similar spectra.
References in corpus (37)
- The Interface Region Imaging Spectrograph (IRIS)
- The Solar Optical Telescope for the Hinode Mission: An Overview
- CRISP Spectropolarimetric Imaging of Penumbral Fine Structure
- A Tale Of Two Spicules: The Impact of Spicules on the Magnetic Chromosphere
- Thermal Diagnostics with the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory: A Validated Method for Differential Emission Measure Inversions
- Observing the Roots of Solar Coronal Heating - in the Chromosphere
- Dynamic Fibrils are driven by Magnetoacoustic Shocks
- Ubiquitous torsional motions in type II spicules
- On-disk counterparts of type II spicules in the Ca II 854.2 nm and Halpha lines
- Quantifying Spicules
- Solar fine-scale structures. I. Spicules and other small-scale, jet-like events at the chromospheric level: observations and physical parameters
- Generation of Solar Spicules and Subsequent Atmospheric Heating
- An Interface Region Imaging Spectrograph first view on Solar Spicules
- On the prevalence of small-scale twist in the solar chromosphere and transition region
- Flocculent flows in the chromospheric canopy of a sunspot
- On red shifs in the transition region and corona
- Search for high velocities in the disk counterpart of type II spicules
- Magnetoacoustic shocks as driver of quiet Sun mottles
- Interplay of three kinds of motion in the disk counterpart of type II spicules: up-flow, transversal and torsional motions
- Ubiquitous High Speed Transition Region and Coronal Upflows in the Quiet Sun
- Statistical properties of the Disk Counterparts of Type II Spicules from simultaneous observations of RBEs in Ca II 8542 and Hα
- Heating signatures in the disk counterparts of solar spicules in IRIS observations
- Recovering Thermodynamics from Spectral Profiles observed by IRIS: A Machine and Deep Learning Approach
- The Dynamics of Rapid Redshifted and Blueshifted Excursions in the Solar Halpha line
- On The Doppler Velocity of Emission Line Profiles Formed in the "Coronal Contraflow" that is the Chromosphere-Corona Mass Cycle
- Asymmetries of the Stokes V profiles observed by HINODE SOT/SP in the quiet Sun
- Kelvin-Helmholtz instability in solar chromospheric jets: theory and observation
- Quiet Sun Hα Transients and Corresponding Small-Scale Transition Region and Coronal Heating
- The quiet Sun average Doppler shift of coronal lines up to 2 MK
- The Appearance of Spicules in High Resolution Observations of Ca II H and H-alpha
- On the solar chromosphere observed at the limb with Hinode
- Spicules and downflows in the solar chromosphere
- Is the sky the limit? Performance of the revamped Swedish 1-m Solar Telescope and its blue- and red-beam re-imaging systems
- Evidence of multithermal nature of spicular downflows. Impact on solar atmospheric heating
- Disentangling flows in the solar transition region
- Statistical Investigation of Supersonic Downflows in the Transition Region above Sunspots
- Chromospheric counterparts of solar transition region unresolved fine structure loops