Mechanism for flow generation/acceleration in dense degenerate stellar atmospheres
arXiv:1707.09216 · doi:10.1007/s10509-017-3147-3
Abstract
The mechanism for flow generation in dense degenerate stellar atmospheres is suggested when the electron gas is degenerate and ions are assumed to be classical. It is shown, that there is a catastrophe in such system -- fast flows are generated due to magneto-fluid coupling near the surface. Distance over which acceleration appears is determined by the strength of gravity and degeneracy parameter. Application of this mechanism for White Dwarfs' atmospheres is examined and appropriate physical parameter range for flow generation/acceleration is found; possibility of the super-Alfvénic flow generation is shown; the simultaneous possibility of flow acceleration and magnetic field amplification for specific boundary conditions is explored; in some cases initial background flow can be accelerated 100 and more times leading to transient jet formation while the Magnetic field amplification is less strong.
11 pages, typos corrected
References in corpus (10)
- Pulsating White Dwarf Stars and Precision Asteroseismology
- Corona of Magnetars
- Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
- MHD simulations of jet acceleration from Keplerian accretion disks: the effects of disk resistivity
- Spectropolarimetric Survey of Hydrogen-rich White Dwarf Stars
- The Unresolved Fine Structure Resolved - IRIS observations of the Solar Transition Region
- Homologous Helical Jets: Observations by IRIS, SDO and Hinode and Magnetic Modeling with Data-Driven Simulations
- Calibration of the Mixing-Length Theory for Convective White Dwarf Envelopes
- The incidence of magnetic fields in cool DZ white dwarfs
- Beltrami-Bernoulli Equilibria in Plasmas with Degenerate Electrons