On the periodicities present in the optical light curves of Small Magellanic Cloud Be/X-ray binaries

被引：33

作者：

Bird, A. J. ^{[1
]}

Coe, M. J. ^{[1
]}

McBride, V. A. ^{[1
,2
,3
]}

Udalski, A. ^{[4
]}

机构：

[1] Univ Southampton, Southampton SO17 1BJ, Hants, England

[2] Univ Cape Town, Dept Astron, Astron Grav & Cosmol Ctr, ZA-7701 Rondebosch, South Africa

[3] S African Astron Observ, ZA-7935 Cape Town, South Africa

[4] Univ Warsaw Observ, PL-00478 Warsaw, Poland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 423卷 / 04期

基金：

新加坡国家研究基金会; 欧洲研究理事会;

关键词：

circumstellar matter; stars:; emission-line; Be; stars: oscillations; Magellanic Clouds; X-rays: binaries; X-RAY; VARIABILITY; PULSARS; COUNTERPART; LONG;

D O I：

10.1111/j.1365-2966.2012.21163.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a comprehensive study of the periodic variations observed in OGLEI-band light curves of Small Magellanic Cloud (SMC) Be/X-ray binaries, discovering new optical periodicities in nine systems. We find that these periodicities are derived from a number of mechanisms, notably disturbance of the decretion disc on the orbital period of the system, and aliased non-radial pulsations. We develop metrics that allow these mechanisms to be distinguished on the basis of the shape of the folded optical light curve, and use these metrics to categorize the periodicities present in similar to 50 SMC binary systems. We conclude that extreme care must be taken in the interpretation of the OGLE light curves since only around 30 per cent of the periodicities present can be unambiguously attributed to orbital periods.

引用

页码：3663 / 3678

页数：16

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