Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-02-12
Astronomy and Astrophysics
Astrophysics
13 pages, to appear in The Astrophysical Journal
Scientific paper
10.1086/340290
We study an empirical model for a unified description of the power spectra of accreting neutron stars and black holes. This description is based on a superposition of multiple Lorentzians and offers the advantage that all QPO and noise components are dealt with in the same way, without the need of deciding in advance the nature of each component. This approach also allows us to compare frequencies of features with high and low coherences in a consistent manner and greatly facilitates comparison of power spectra across a wide range of source types and states. We apply the model to six sources, the low-luminosity X-ray bursters 1E 1724-3045, SLX 1735-269 and GS 1826-24, the high-latitude transient XTE J1118+480, the bright system Cir X-1, and the Z source GX 17+2. We find that it provides a good description of the observed spectra, without the need for a scale-free (1/f) component. We update previously reported correlations between characteristic frequencies of timing features in the light of this new approach and discuss similarities between different types of systems which may point towards similar underlying physics.
Belloni Tomaso
Psaltis Dimitrios
van der Klis Michiel
No associations
LandOfFree
A Unified Description of the Timing Features of Accreting X-ray Binaries does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Unified Description of the Timing Features of Accreting X-ray Binaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Unified Description of the Timing Features of Accreting X-ray Binaries will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-308505