An analytical MHD wind model with latitudinal dependences obtained using separation of the variables

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

Lima, JJG (Autor) FCUP; Priest, ER (Autor) Outra; Tsinganos, K (Autor) Outra

Revista

Título: Astronomy and Astrophysics

Vol. 371

ISSN: 0004-6361

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 20 Citações

Scopus - 22 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-VJR

Abstract (EN): A new class of analytical 2-D solutions of the full set of the steady magnetohydrodynamic (MHD) equations, describing an axisymmetric helicoidal magnetized out ow originating from a rotating central object, is presented. The solutions are systematically obtained via a nonlinear separation of the variables in the momentum equation. The analysis yields three parameters which measure the anisotropy in the latitudinal distribution of various ow quantities. Topologically, the wind speed is controlled by an X-type critical point that acts to filter out a single wind-type branch and the Alfven singularity. The solutions can be regarded as an extension outside the equatorial plane of the Weber & Davis (1967) model of magnetized winds but with a variable polytropic index.

Idioma: Inglês

Tipo (Avaliação Docente): Científica