Dynamics of coronal rain and descending plasma blobs in solar prominences: I. Fully ionised case

@article{Oliver2013DynamicsOC,
  title={Dynamics of coronal rain and descending plasma blobs in solar prominences: I. Fully ionised case},
  author={Ram{\'o}n Oliver and Roberto Soler and Jaume Terradas and Teimuraz V. Zaqarashvili and Maxim L. Khodachenko},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2013}
}
Observations of active regions and limb prominences often show cold, dense blobs descending with an acceleration smaller than that of free fall. The dynamics of these condensations falling in the solar corona is investigated in this paper using a simple fully ionised plasma model. We find that the presence of a heavy condensation gives rise to a dynamical rearrangement of the coronal pressure that results in the formation of a large pressure gradient that opposes gravity. Eventually this… 
Dynamics of coronal rain and descending plasma blobs in solar prominences: II. partially ionized case
Observations of active regions and limb prominences often show cold, dense blobs descending with an acceleration smaller than that of free fall. The dynamics of these condensations falling in the
Two-dimensional simulations of coronal rain dynamics
Context. Coronal rain often comes about as the final product of evaporation and condensation cycles that occur in active regions. Observations show that the condensed plasma falls with an
Dynamics of plasma condensations in a gravitationally stratified coronal loop
Context Coronal rain composed of cool plasma condensations falling from coronal heights is a phenomenon occurring in footpoint-heated coronal loops as a result of thermal instability.
Analysis of coronal rain observed by IRIS, HINODE/SOT and SDO/AIA : transverse oscillations, kinematics and thermal evolution
Coronal rain composed of cool plasma condensations falling from coronal heights along magnetic field lines is a phenomenon occurring mainly in active region coronal loops. Recent high resolution
Excitation of vertical coronal loop oscillations by plasma condensations
Context. Coronal rain composed of downfalling cool plasma condensations occurs in thermally unstable loops as a consequence of catastrophic cooling. Such loops contain significant quantities of
Kinematics of coronal rain in a transversely oscillating loop: Ponderomotive force and rain-excited oscillations
Context. Coronal rain are cool dense blobs that form in solar coronal loops and are a manifestation of catastrophic cooling linked to thermal instability. Once formed, rain falls towards the solar
Multi-Scale Variability of Coronal Loops Set by Thermal Non-Equilibrium and Instability as a Probe for Coronal Heating
Solar coronal loops are the building blocks of the solar corona. These dynamic structures are shaped by the magnetic field that expands into the solar atmosphere. They can be observed in X-ray and
Dynamics of Descending Knots in a Solar Prominence and Their Possible Contributions to the Heating of the Local Corona
The knots in solar prominences are often observed to fall with nearly constant velocity, but the associated physical mechanism is currently not well understood. In this letter, we presented a
Thermal instability and non-equilibrium in solar coronal loops: from coronal rain to long-period intensity pulsations
The complex interaction of the magnetic field with matter is the key to some of the most puzzling observed phenomena at multiple scales across the universe, from tokamak plasma confinement
Simulating coronal condensation dynamics in 3D
...
...

References

SHOWING 1-10 OF 33 REFERENCES
Dynamics of solar coronal loops II. Catastrophic cooling and high-speed downflows
This work addresses the problem of plasma condensation and "catastrophic cooling" in solar coronal loops. We have carried out numerical calculations of coronal loops and find several classes of
Transverse Oscillations of Loops with Coronal Rain Observed by Hinode/Solar Optical Telescope
The condensations composing coronal rain, falling down along loop-like structures observed in cool chromospheric lines such as H? and Ca II H, have long been a spectacular phenomenon of the solar
CORONAL RAIN AS A MARKER FOR CORONAL HEATING MECHANISMS
Reported observations in Hα ,C aii H, and K or other chromospheric lines of coronal rain trace back to the days of the Skylab mission. Corresponding to cool and dense plasma, coronal rain is often
Observing the Fine Structure of Loops through High-resolution Spectroscopic Observations of Coronal Rain with the CRISP Instrument at the Swedish Solar Telescope
Observed in cool chromospheric lines, such as H? or Ca II H, coronal rain corresponds to cool and dense plasma falling from coronal heights. Considered as a peculiar sporadic phenomenon of active
A DROPLET MODEL OF QUIESCENT PROMINENCE DOWNFLOWS
Observations of quiescent prominences with the Solar Optical Telescope on the Hinode satellite have revealed the ubiquitous existence of downflows forming coherent thin and highly structured
DYNAMICS OF VERTICAL THREADS AND DESCENDING KNOTS IN A HEDGEROW PROMINENCE
The existence and behavior of vertical fine structures of plasma—threads and knots—are a significant observational clue to understanding the magnetic structure and dynamics of quiescent prominences
MULTIDIMENSIONAL MODELING OF CORONAL RAIN DYNAMICS
We present the first multidimensional, magnetohydrodynamic simulations that capture the initial formation and long-term sustainment of the enigmatic coronal rain phenomenon. We demonstrate how
Neutral Atom Diffusion in a Partially Ionized Prominence Plasma
The support of solar prominences is normally described in terms of a magnetic force on the prominence plasma that balances the solar gravitational force. Because the prominence plasma is only
Counter-streaming gas flows in solar prominences as evidence for vertical magnetic fields
Solar prominences are sheets of relatively cool and dense gas embedded in the surrounding hotter corona. An erupting prominence can inject a mass of up to 1015 g into the solar wind as part of a
Hinode SOT Observations of Solar Quiescent Prominence Dynamics
We report findings from multihour 0.2'' resolution movies of solar quiescent prominences (QPs) observed with the Solar Optical Telescope (SOT) on the Hinode satellite. The observations verify
...
...