A qualitative model for GX5-1

Details A qualitative model for GX5-1 A qualitative model for GX5-1

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...154l..23b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 154, no. 1-2, Jan. 1986, p. L23-L25.

Astronomy and Astrophysics

Astrophysics

10

Accretion Disks, Neutron Stars, Stellar Magnetic Fields, Stellar Models, X Ray Spectra, Milky Way Galaxy, Power Spectra

Scientific paper

Recent observations of the galactic bright bulge source GX5-1 have shown quasi-periodic oscillations in the X-ray flux which appear as a broad peak in the power spectrum with a centroid frequency in the range 20-40 Hz. In addition, there is a red noise component in the spectrum, the slope of which, along with the centroid frequency and width of the quasi-oscillation peak, is correlated with the intensity of the source. A qualitative model to explain the essential features of GX5-1 is presented. It is found that computer simulations of power spectra, derived from a model with accretion from discrete sites around the disk together with a periodic modulation of the accretion flow due to a magnetic field asymmetry, well mimic the actual power spectra observed.

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