在高质量X射线双星中寻找磁星。SuperGiant快速X射线瞬态情况
Hunting for Magnetars in High Mass X-ray Binaries. The Case of SuperGiant Fast X-Ray Transients
摘要：
本文综述了由磁中子星和超巨星伴星组成的高质量X射线双星的风吸积理论。特别是，我们集中在不同类型的流入风的物质和中子星磁层之间的相互作用是相关的吸积物质到中子星表面在很大程度上被抑制时，这些包括抑制的离心和磁屏障。我们发现，非常大的光度波动（在短至小时的时间尺度上约为10^4或更大）可以由不同区域的跃迁引起。这种情况下，然后应用到超巨星快速X射线瞬变（SFXTs），一个新的类的高质量X射线双星在我们的星系最近发现的INTEGRAL显示的活动。根据这种解释，我们认为，SFXTs显示非常大的光度摆动和主机缓慢旋转的中子星预计将其特征在于类磁星场。因此，超巨星快速X射线瞬变可能为探测和研究双星系统中的吸积磁星提供了一个独特的机会。
英文摘要：
In this paper we summarize some aspects of the wind accretion theory in high mass X-ray binaries hosting a magnetic neutron star and a supergiant companion. In particular, we concentrate on the different types of interaction between the inflowing wind matter and the neutron star magnetosphere that are relevant when accretion of matter onto the neutron star surface is largely inhibited; these include inhibition by the centrifugal and magnetic barriers. We show that very large luminosity swings (~10^4 or more on time scales as short as hours) can result from transitions across different regimes. This scenario is then applied to the activity displayed by supergiant fast X-ray transients (SFXTs), a new class of high mass X-ray binaries in our galaxy recently discovered with INTEGRAL. According to this interpretation we argue that SFXTs which display very large luminosity swings and host a slowly spinning neutron star are expected to be characterized by magnetar-like fields. Supergiant fast X-ray transients might thus provide a unique opportunity to detect and study accreting magnetars in binary systems.
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