SIMBAD references

2019ApJ...872..102X - Astrophys. J., 872, 102-102 (2019/February-2)

On the bimodal spin-period distribution of Be/X-Ray pulsars.

XU X.-T. and LI X.-D.

Abstract (from CDS):

It has been reported that there are two populations of Be/X-ray pulsars, with the pulse period distribution peaked at ∼10 s and ∼200 s, respectively. A possible explanation of this bimodal distribution is related to different accretion modes in Be/X-ray binaries. In this work, we investigate the spin evolution of Be/X-ray pulsars based on the magnetically threaded accretion disk model. Compared with previous works, we take into account several distinct and important factors of Be/X-ray binaries, including the transient accretion behavior and possible change of the accretion disk structure during quiescence. We demonstrate that current Be/X-ray pulsars are close to the spin equilibrium determined by the balance of spin-up during outbursts and spin down during quiescence, and that the observed bimodal distribution can be well reproduced by the equilibrium spin periods with reasonable input parameters.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - stars: emission-line, Be - X-rays: binaries

Simbad objects: 2

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