2009
DOI: 10.1088/2041-8205/708/2/l116
|View full text |Cite
|
Sign up to set email alerts
|

A Turbulence-Driven Model for Heating and Acceleration of the Fast Wind in Coronal Holes

Abstract: A model is presented for generation of fast solar wind in coronal holes, relying on heating that is dominated by turbulent dissipation of MHD fluctuations transported upwards in the solar atmosphere. Scale-separated transport equations include large-scale fields, transverse Alfvénic fluctuations, and a small compressive dissipation due to parallel shears near the transition region. The model accounts for proton temperature, density, wind speed, and fluctuation amplitude as observed in remote sensing and in sit… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

6
225
2
1

Year Published

2010
2010
2016
2016

Publication Types

Select...
4
3
1

Relationship

0
8

Authors

Journals

citations
Cited by 220 publications
(234 citation statements)
references
References 44 publications
6
225
2
1
Order By: Relevance
“…Spectral indices obtained from the power-law distribution indicates presence of Kolmogorov like turbulence (Kolmogorov 1941). Results presented in this study may be important in the theoretical modelling of coronal heating and acceleration of the fast solar wind in the coronal holes from the MHD turbulence Verdini et al 2010).…”
Section: Resultsmentioning
confidence: 86%
See 1 more Smart Citation
“…Spectral indices obtained from the power-law distribution indicates presence of Kolmogorov like turbulence (Kolmogorov 1941). Results presented in this study may be important in the theoretical modelling of coronal heating and acceleration of the fast solar wind in the coronal holes from the MHD turbulence Verdini et al 2010).…”
Section: Resultsmentioning
confidence: 86%
“…Recently, Cranmer & van Ballegooijen (2005); Cranmer et al (2007) and Verdini et al (2010) developed models of selfconsistent coronal heating and acceleration of fast solar wind. In these models, convective motions at the foot-points of magnetic flux tubes are assumed to generate wave-like fluctuations that propagate up into the extended corona, partially reflect back, develop into strong magnetohydrodynamic (MHD) turbulence, and then damped by an anisotropic turbulent cascade.…”
Section: Turbulence Power Spectra In the Polar Coronal Holementioning
confidence: 99%
“…The presence of these Alfvénic wave motions in the plumes may also go a long way to explaining the enigmatic plume-interplume 1 relationship of emission line widths (e.g., Hassler et al 1997;Wilhelm 2000). Finally, we speculate that because the (Alfvén) phase speed of the waves is significantly higher than the field-aligned upflows, the mass on the field line can lead to ideal reflecting conditions for the formation of a turbulent cascade of the Alfvénic wave energy into the plasma that is needed to accelerate the wind (e.g., Velli 1993;Matthaeus et al 1999;Verdini et al 2010). It is likely that precise spectroscopic imaging experiments (e.g., Tomczyk et al 2007) must be made in polar regions to accurately investigate the propagation and magnitude of Alfvén waves in the plume and inter-plume regions.…”
Section: Discussionmentioning
confidence: 86%
“…A primary goal of this study is to explore the potential unification of a wave-turbulence model that describes the heating and acceleration of the fast solar wind with one that describes heating in the low corona. To this end, we employ the same formulation for the evolution of low-frequency Alfvén wave turbulence as Lionello et al (2014b, a solar wind study), which is based on the work of Velli (1993) and most recently Verdini et al (2010). Invoking symmetry in the perpendicular direction to the mean field and the limit of low frequencies (ω → 0), the evolutionary equations can be expressed in terms of the scalar magnitude of the Elsässer variables, z ± = δu∓δb/ √ 4πρ, and take the following form:…”
Section: Wtd Heating Modelmentioning
confidence: 99%
“…For an open flux tube, such as those studied by (Verdini et al 2010;Lionello et al 2014b), heating strictly arises from the self-reflection of the outward propagating waves, while for a closed flux tube, interactions may arise both from self-reflection and via the counter-propagating waves launched at the opposite loop footpoint. In the latter case, the degree to which the fluctuations are correlated will determine their level of interaction and hence the dissipation rate.…”
Section: Wtd Heating Modelmentioning
confidence: 99%