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CAN ANY 'INVARIANTS' BE REVEALED IN QUASI-PERIODIC PHENOMENA OBSERVED FROM SCORPIUS X-1?

机译:从SCORPIUS X-1观察到的准周期现象中可以发现任何“不变性”吗?

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Using a large number of Rossi X-Ray Timing Explorer observations of Scorpius X-1, we present a detailed investigation of the transition layer and relativistic precession models (TLM and RPM, respectively). These models predict the existence of the invariant quantities: an inclination angle δ of the magnetospheric axis with the normal to the disk for the TLM and a neutron star (NS) mass M_(NS) for the RPM. Theoretical predictions of both models are tested, and their self-consistency is checked. We establish the following: (1) The inferred δ-value is 5°.56 +- 0°.09. Correlation of the δ-values with the horizontal-branch oscillation (HBO) frequency is rather weak. (2) There is a strong correlation between an inferred M_(NS) and the HBO frequency in the RPM frameworks. (3) We infer M_(NS) for different assumptions regarding the relations between the HBO frequency v_(HBO) and the nodal frequency v_(nod). We find that the inferred M_(NS) = 2.7 +- 0.1 solar mass cannot be consistent with any equation of state of NS matter. We conclude that the RPM fails to describe the data while the TLM seems to be compatible.
机译:使用Scorpius X-1的大量Rossi X射线Timing Explorer观测值,我们对过渡层和相对论进动模型(分别为TLM和RPM)进行了详细研究。这些模型预测存在不变量:对于TLM,磁层轴与圆盘法线的倾斜角δ,对于RPM,中子星(NS)质量M_(NS)。测试了两个模型的理论预测,并检查了它们的自洽性。我们建立以下条件:(1)推断的δ值为5°.56 +-0°.09。 δ值与水平分支振荡(HBO)频率的相关性很弱。 (2)在RPM框架中,推断的M_(NS)与HBO频率之间存在很强的相关性。 (3)对于HBO频率v_(HBO)与节点频率v_(nod)之间的关系,我们针对不同的假设推断M_(NS)。我们发现,推断的M_(NS)= 2.7 +-0.1太阳质量不能与NS物质的任何状态方程式保持一致。我们得出的结论是,RPM无法描述数据,而TLM似乎是兼容的。

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