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

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Lima, JJG (Author) FCUP; Priest, ER (Author) Other; Tsinganos, K (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 371

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 20 Citations

Scopus - 22 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific