EDP Sciences
Free access
Issue
A&A
Volume 381, Number 3, January III 2002
Page(s) L61 - L63
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20011661


A&A 381, L61-L63 (2002)
DOI: 10.1051/0004-6361:20011661

Letter

Supersonic propeller spindown of neutron stars in wind-fed mass-exchange close binaries

N. R. Ikhsanov

Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, Pulkovo 65-1, 196140 Saint-Petersburg, Russia

(Received 19 November 2001 / Accepted 26 November 2001)

Abstract
The supersonic propeller spindown of a neutron star moving in a strong stellar wind of its massive companion is discussed. I show that the supersonic propeller model presented by Davies & Pringle (1981) is self-consistent if the strength of the stellar wind of the normal companion is $\dot{M}_{\rm c} \la 2.2\times10^{18}\
(M_{\rm ns}/M_{\odot})\ V_8\ {\rm g\,s^{-1}}$ . Under these conditions the model can be used for the interpretation of the long-period pulsars in Be/X-ray transients. The spin history of the neutron star in the long period Be/X-ray transient A0535+26 is considered.


Key words: accretion -- propeller spindown -- stars: close binaries -- stars: neutron star -- stars: Be/X-ray transients




© ESO 2002