Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Modelling ambipolar diffusion with two-fluid smoothed particle hydrodynamics

Hosking, J.G. and Whitworth, Anthony Peter 2004. Modelling ambipolar diffusion with two-fluid smoothed particle hydrodynamics. Monthly Notices of the Royal Astronomical Society 347 (3) , pp. 994-1000. 10.1111/j.1365-2966.2004.07273.x

Full text not available from this repository.


We describe a fully three-dimensional, Lagrangian magnetohydrodynamics code that is able to treat self-gravitating gas dynamics and to take account of ambipolar diffusion. The ion density is given as a function of the local neutral density, using an expression derived from models of ionization balance in molecular clouds. In turn, the ion density determines the strength of the coupling between the ionized and neutral fluids. The code is tested by modelling the evolution of a dense core, which is initially thermally supercritical but magnetically subcritical. The core steadily loses its magnetic support through ambipolar diffusion, and eventually becomes unstable against collapse. Our results agree well with those obtained by Fiedler and Mouschovias, who modelled the same system using a two-dimensional finite-difference code. In a second paper, we apply this code to the collapse and fragmentation of a rotating prestellar core.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: magnetic fields; MHD; stars: formation; stars: general; stars: magnetic fields
Publisher: Oxford University Press
ISSN: 0035-8711
Last Modified: 04 Jun 2017 04:58

Citation Data

Cited 29 times in Google Scholar. View in Google Scholar

Cited 22 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item