Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-11-13
Astrophys.J.694:387-395,2009
Astronomy and Astrophysics
Astrophysics
12 pages including 2 tables and 5 figures; accepted for publication in The Astrophysical Journal
Scientific paper
10.1088/0004-637X/694/1/387
We propose a unified model to explain Quasi-Periodic-Oscillation (QPO), particularly of high frequency, observed from black hole and neutron star systems globally. We consider accreting systems to be damped harmonic oscillators exhibiting epicyclic oscillations with higher order nonlinear resonance to explain QPO. The resonance is expected to be driven by the disturbance from the compact object at its spin frequency. The model explains various properties parallelly for both types of the compact object. It describes QPOs successfully for ten different compact sources. Based on it, we predict the spin frequency of the neutron star Sco X-1 and specific angular momentum of black holes GRO J1655-40, XTE J1550-564, H1743-322, GRS 1915+105.
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