CosmicRaymodified Stellar Winds. I. Solution Topologies and Singularities
Abstract
A twofluid hydrodynamical model describing the modification of a stellar wind flow owing to its interaction with Galactic cosmic rays is investigated. The cosmic rays are coupled to the stellar wind by scattering with hydromagnetic waves or irregularities propagating in the backgrouund flow. A onefluid polytropic model is used to describe the thermal stellar wind gas. The cosmic rays are considered to be a hot, lowdensity gas with negligible mass flux, but with a significant pressure and energy flux. The solutions are shown to possess a line of singularities in (r,u,P_{c})space, where r, u, and P_{c} denote the radial distance from the star, the radial wind flow speed, and the cosmicray pressure, respectively. Astrophysical applications are briefly discussed.
 Publication:

The Astrophysical Journal
 Pub Date:
 December 1987
 DOI:
 10.1086/165861
 Bibcode:
 1987ApJ...323..657K
 Keywords:

 Astronomical Models;
 Galactic Cosmic Rays;
 Stellar Radiation;
 Stellar Winds;
 Two Fluid Models;
 Interstellar Gas;
 Matrices (Mathematics);
 Singularity (Mathematics);
 Wind Velocity;
 Astrophysics;
 COSMIC RAYS: GENERAL;
 HYDROMAGNETICS;
 STARS: WINDS