High-frequency QPOs in GRO J1655-40: Constraints on resonance models by spectral fits

Details High-frequency QPOs in GRO J1655-40: Constraints on resonance models by spectral fits High-frequency QPOs in GRO J1655-40: Constraints on resonance models by spectral fits

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ragt.meet...39b&link_type=abstract

In Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars, Opava, 16-18/18-20 September, 2004/2005; S. Hledík an

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Scientific paper

A class of resonance models has been proposed to explain the high-frequency quasi-periodic oscillations observed from Galactic black-hole sources. The spin predictions given by these models are compared with the recent angular momentum estimate for GRO J1655-40. It is found that none of the present resonance models is consistent with the value of the spin obtained by spectral fits of the X-ray continuum. Instead, observational constraints seem to favour another, so far not considered resonance between the vertical epicyclic frequency and the periastron precession frequency.

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