SIMBAD references

1999ApJ...520..271L - Astrophys. J., 520, 271-275 (1999/July-3)

Can the anomalous X-ray pulsars Be powered by accretion?.

LI X.-D.

Abstract (from CDS):

The nature of the 5-12 s ``anomalous'' X-ray pulsars (AXPs) remains a mystery. Among the models that have been proposed to explain the properties of AXPs, the most likely are (1) isolated accreting neutron stars evolved from the Thorne-{Zdot}ytkow objects (T{Zdot}Os) due to complete spiral-in during the common envelope (CE) evolution of high-mass X-ray binaries (HMXBs), and (2) magnetars, which are neutron stars with ultrahigh (∼1014-1015 G) surface magnetic fields. We have critically examined the predicted change of a neutron star's spin in the accretion model, and found that it is unable to account for the steady spin-down observed in AXPs. A simple analysis also shows that any accretion disk around an isolated neutron star has an extremely limited lifetime. A more promising explanation for such objects is the magnetar model.

Abstract Copyright:

Journal keyword(s): Accretion, Accretion Disks - Stars: Binaries: Close - Stars: Pulsars: General - Stars: Neutron - X-Rays: Stars

Simbad objects: 14

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