Quasi-periodic oscillations in the X-ray flux of the rapid burster (MXB 1730-335)

Details Quasi-periodic oscillations in the X-ray flux of the rapid burster (MXB 1730-335) Quasi-periodic oscillations in the X-ray flux of the rapid burster (MXB 1730-335)

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..379s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 379-390.

Astronomy and Astrophysics

Astronomy

39

Emission Spectra, Radiant Flux Density, Spaceborne Astronomy, Stellar Oscillations, Stellar Spectrophotometry, X Ray Binaries, Bursts, Exosat Satellite, Stellar Models

Scientific paper

The authors report on the results of an EXOSAT observation of the "Rapid Burster" in 1985 August during an active state. Forty 1 - 10 minute long type 2 bursts were detected together with persistent emission. Quasi-periodic oscillations (QPO) were observed in 23 bursts with frequencies between 2 and 5 Hz. The average frequency of the QPO during the bursts was anticorrelated with the average burst flux, and the rms strength of the QPO was as high as ≡20% during the longest bursts. Among the models for QPO in low-mass X-ray binaries that involve the presence of a neutron star magnetosphere, only the beat frequency model is still consistent with the QPO properties of the Rapid Burster.

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