Quasi-periodic oscillations in the X-ray flux from Centaurus X-3 observed with GINGA

Details Quasi-periodic oscillations in the X-ray flux from Centaurus X-3 observed with GINGA Quasi-periodic oscillations in the X-ray flux from Centaurus X-3 observed with GINGA

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43l..43t&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 4, 1991, p. L43-L50.

Astronomy and Astrophysics

Astronomy

32

Ginga Satellite, Pulsars, Spaceborne Astronomy, Stellar Oscillations, X Ray Binaries, Light Curve, Power Spectra, Stellar Mass Accretion, Stellar Rotation

Scientific paper

Results are presented of observations of the 4.8 X-ray binary pulsar Centaurus X-3 from March 22 to 24, 1989. In addition to coherent 4.8-s pulsations, clear quasi-periodic oscillations (QPOs) were detected in the X-ray flux during a portion of the observations. The centroid frequency and the width of the QPOs were 35 +/-2 mHz and 10 +/-5 mHz, respectively. The centroid frequency of the QPOs was stable during that portion of the observation, and no correlation was found between the QPO amplitude and the X-ray energy. Constraints on QPO models, such as the Kepler frequency and beat frequency models, are discussed on the basis of the present observations of QPOs from Cen X-3.

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