Correlation between Break Frequency and Power Density Spectrum Slope for the X-ray Source Cygnus X-2: RXTE/PCA Data
Abstract
We present results of RXTE observations of the X-ray source Cyg X-2 during 1996-1999. Its power density spectra in the 0.1-128-Hz band are fitted by a model that takes into account the power-law spectral behavior at frequencies below and above the break frequency, with an introduction of one or more Lorenz lines to describe the peaks of quasi-periodic oscillations that correspond to the horizontal branch of the Z track. The RXTE observations have revealed a positive correlation between the break frequency and the indices of the two parts of the spectrum. The spectrum steepens with increasing break frequency both above and below the break frequency.
Cite
@article{arxiv.astro-ph/0110400,
title = {Correlation between Break Frequency and Power Density Spectrum Slope for the X-ray Source Cygnus X-2: RXTE/PCA Data},
author = {Sergey Kuznetsov},
journal= {arXiv preprint arXiv:astro-ph/0110400},
year = {2009}
}
Comments
7 pages, 2 figures, To be published in Astronomy Letters, Vol. 27, No. 12, 2001, pp. 790-793 (English version by "MAIK Nauka")