Correlation between Fast Quasi-periodic Oscillations and X-Ray Spectral Shape in Atoll Sources

Details Correlation between Fast Quasi-periodic Oscillations and X-Ray Spectral Shape in Atoll Sources Correlation between Fast Quasi-periodic Oscillations and X-Ray Spectral Shape in Atoll Sources

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...497l..93k&link_type=abstract

Astrophysical Journal Letters v.497, p.L93

Astronomy and Astrophysics

Astronomy

29

Accretion, Accretion Disks, Stars: Individual Alphanumeric: 4U 0614+091, Stars: Individual Alphanumeric: 4U 1608-52, Stars: Neutron, X-Rays: Stars

Scientific paper

We present correlations between the frequency of the fast quasi-periodic oscillations (QPOs) and the shape of the X-ray spectrum in the atoll sources 4U 1608-52 and 4U 0614+091. We find that the photon index of a power-law component of the energy spectrum is well correlated with the QPO frequency in both sources. The correlation between the photon index and the QPO frequency most likely represents a common dependence on some physical parameter of the system.

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