A Few Properties of X-Ray Novae: Observed Low Frequency QPOs and Accretion Disk Structure Soon-Wook Kim (Korea Astronomy and Space Science Institute). Abstract.
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A Few Properties of X-Ray Novae:Observed Low Frequency QPOs and Accretion Disk StructureSoon-Wook Kim(Korea Astronomy and Space Science Institute)
We examine possible correlations of a few known observational physical parameters, such as orbital period, mass function and black hole mass, to the observed values of low frequency quasi-periodic oscillations (QPOs). The possible correlations are discussed on the context of the physics of accretion.
are known, where Mx and Mc are black hole and companion masses, Kc is the velocity amplitude of the companion star, Porb is the orbital period, and G is the gravitational constant.Among these sources, the nature of companions for two sources are unknown. In addition, the quasi-periodic oscillations (QPOs) at the lower frequencies of ~mHz up to ~30Hz are not available in 4 sources. We therefore examine 12 sources to find correlations among these parameters. In spite of the microquasar nature, Cygnus X-3 is excluded as a dynamically confirmed black hole.
Conclusion: correlation of ~mHz QPOs to the orbital period ?