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>Can Any 'Invariants' Be Revealed in Quasi-periodic Phenomena Observed From Sco X-1?
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Can Any 'Invariants' Be Revealed in Quasi-periodic Phenomena Observed From Sco X-1?
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机译：可以在观察到的准周期现象中揭示任何“不变量” 来自sco X-1？
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摘要
Using large number of Rossi X-ray Time Explorer observations of Sco X-1 wepresent a detailed investigation of the transition layer (TL) and therelativistic precession (RP) models. These models predict the existence of theinvariant quantities: an inclination angle delta of the magnetospheric axiswith the normal to the disk for the TLM and a neutron star (NS) mass M_{NS} forthe RPM. Theoretical predictions of both models are tested and theirself-consistency is checked. We establish that: (1) The inferred delta angle is5.56+/-0.09 degrees. Correlation of the delta-values with the horizontal branchoscillation (HBO) frequency is rather weak. (2) There is a strong correlationbetween an inferred M_{NS} and the HBO frequency in the RPM frameworks. (3) Weinfer M_{NS} for different assumptions regarding the relations between the HBOfrequency and the nodal frequency. We find that the inferred M_{NS}=2.7+/-0.1M_sun cannot be consistent with any EOS of NS matter. We conclude that RPMfails to describe the data while TLM seems to be compatible.
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