Canonical time variations of X-rays from black hole candidates in the low-intensity state

Details Canonical time variations of X-rays from black hole candidates in the low-intensity state Canonical time variations of X-rays from black hole candidates in the low-intensity state

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391l..21m&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 391, no. 1, May 20, 1992, p. L21-L24.

Astronomy and Astrophysics

Astronomy

146

Black Holes (Astronomy), Light Curve, X Ray Stars, Accretion Disks, Interstellar Matter

Scientific paper

The power spectrum density functions of X-rays and the phase lags of the time variations between different energy X-rays were investigated for several black-hole candidates (Cyg X - 1, GX 339 - 4, and GS 2023 + 338) in their low-intensity state, to determine whether these density functions were different for different X-ray sources and at different occasions for the same source. The results suggest that, in these black hole candidates in the low-intensity state, the X-ray production process and the dynamics of accreting matter behavior are the same except for the processes which correspond to the Fourier frequencies below about 0.2 Hz.

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