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Issue A&A
Volume 436, Number 2, June III 2005
Page(s) 607 - 613
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20042432



A&A 436, 607-613 (2005)
DOI: 10.1051/0004-6361:20042432

Effects of a solid surface on jet formation around neutron stars

M. Stute1, J. Gracia2 and M. Camenzind1

1  Landessternwarte Heidelberg, Königsstuhl, 69117 Heidelberg, Germany
    e-mail: M.Stute@lsw.uni-heidelberg.de
2  Section of Astrophysics, Astronomy & Mechanics, Department of Physics, University of Athens, Panepistimiopolis, 157 84 Zografos, Athens, Greece

(Received 25 November 2004 / Accepted 3 February 2005 )

Abstract
We present two numerical simulations of an accretion flow from a rotating torus onto a compact object with and without a solid surface - representing a neutron star and a black hole - and investigate its influence on the process of jet formation. We report the emergence of an additional ejection component, launched by thermal pressure inside a boundary layer (BL) around the neutron star and examine its structure. Finally, we suggest improvements for future models.


Key words: ISM: jets and outflows -- magnetohydrodynamics (MHD) -- methods: numerical




© ESO 2005


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