HBO and Periastron Precession around the X-ray Neutron Star Magnetosphere

Details HBO and Periastron Precession around the X-ray Neutron Star Magnetosphere HBO and Periastron Precession around the X-ray Neutron Star Magnetosphere

2000-12-05

arxiv.org/abs/gr-qc/0012017v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

2 pages, 1 figure, submit to Proceedings of The Ninth Marcel Grossman Meeting on Gen. Rel. and Grav. at Rome, Italy, July, 200

Scientific paper

Based on the periastron precession model to account for kHz QPO of the binary X-ray neutron star, proposed by Stella and Vietri, we ascribe the 15-60 Hz Quasi Periodic Oscillation (QPO) to the periastron precession frequency of the orbiting accreted matter at the boundary of magnetosphere-disk of X-ray neutron star (NS). The obtained conclusions include: all QPO frequencies increase with increasing the accretion rate. The theoretical relations between 15-60 Hz QPO (HBO) frequency and the twin kHz QPOs are similar to the measured empirical formula. Further, the better fitted NS mass by the proposed model is about 1.9 solar masses for the detected LMXBs.

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