A new class of discontinuous solar wind solutions
Abstract
A new class of onedimensional solar wind models is developed within the general polytropic, singlefluid hydrodynamic framework. The particular case of quasiadiabatic radial expansion with a localized heating source is considered. We consider analytical solutions with continuous Mach number over the entire radial domain while allowing for jumps in the flow velocity, density, and temperature, provided that there exists an external source of energy in the vicinity of the critical point that supports such jumps in physical quantities. This is substantially distinct from both the standard Parker solar wind model and the original nozzle solutions, where such discontinuous solutions are not permissible. We obtain novel sample analytic solutions of the governing equations corresponding to both slow and fast winds.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 August 2020
 DOI:
 10.1093/mnras/staa1396
 arXiv:
 arXiv:2005.06426
 Bibcode:
 2020MNRAS.496.1023S
 Keywords:

 Sun: heliosphere;
 Sun: fundamental parameters;
 methods: analytical;
 Solar wind;
 Sun: corona;
 Astrophysics  Solar and Stellar Astrophysics;
 Astrophysics  Earth and Planetary Astrophysics;
 Physics  Computational Physics;
 Physics  Fluid Dynamics;
 Physics  Space Physics
 EPrint:
 13 pages, 3 figures, MNRAS, Accepted for publication