SIMBAD references

2007A&A...464..807F - Astronomy and Astrophysics, volume 464, 807-810 (2007/3-4)

On the maximum efficiency of the propeller mass-ejection mechanism.

FALANGA M., BOZZO E., STELLA L., BURDERI L., DI SALVO T. and PERNA R.

Abstract (from CDS):

We derive simple estimates of the maximum efficiency with which matter can be ejected by the propeller mechanism in disk-fed, rotating magnetic neutron stars. Some binary evolution scenarios envisage that this mechanism is responsible for expelling to infinity the mass inflowing at a low rate from the companion star, therefore limiting the total amount of mass that can be accreted by the neutron star. We demonstrate that, for typical neutron star parameters, a maximum of ηpro<5.7(P–3)1/3 times more matter than accreted can be expelled through the propeller mechanism at the expenses of the neutron star rotational energy (P–3 is the NS spin period in unit of 10–3s). Approaching this value, however, would require a great deal of fine tuning in the system parameters and the properties of the interaction of matter and magnetic field at the magnetospheric boundary. We conclude that some other mechanism must be invoked in order to prevent that too much mass accretes onto the neutron stars of some low mass X-ray binaries.

Abstract Copyright:

Journal keyword(s): accretion, accretion: disks - stars: binaries: close - stars: neutron - stars: pulsars: general

Simbad objects: 1

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2007A&A...464..807F and select 'bookmark this link' or equivalent in the popup menu


2022.12.05-23:28:56

© Université de Strasbourg/CNRS

    • Contact