Issue |
A&A
Volume 380, Number 2, December III 2001
|
|
---|---|---|
Page(s) | 520 - 525 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20011413 | |
Published online | 15 December 2001 |
Reflection and noise in the low spectral state of GX 339-4
1
Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
2
Max-Planck-Institute für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany
Corresponding author: M. Revnivtsev, revnivtsev@hea.iki.rssi.ru
Received:
6
February
2001
Accepted:
4
October
2001
We analyze RXTE/PCA observations of GX 339-4 in the low spectral state
from 1996-1997 and show that the pattern of its spectral and temporal
variability is nearly identical to that of Cyg X-1. In particular, a
tight correlation exists between the QPO centroid frequency and the
spectral parameters. An increase of the QPO centroid frequency is
accompanied with an increase of the amplitude of the reflected component
and a steepening the slope of the underlying power law.
Fourier frequency resolved spectral analysis showed, that the
variability of the reflected component at frequencies
higher than ~ Hz is suppressed in comparison with that
of the primary emission.
Key words: accretion, accretion disks / black hole physics / stars: binaries: general / stars: individual: GX 339-4 / X-rays: general / X-rays: stars
© ESO, 2001
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