The statistics of Sco X-1 kHZ QPOs

Details The statistics of Sco X-1 kHZ QPOs The statistics of Sco X-1 kHZ QPOs

2005-10-13

arxiv.org/abs/astro-ph/0510388v1

Astron.Nachr. 326 (2005) 861-863

Astronomy and Astrophysics

Astrophysics

Astronomische Nachrichten, in press

Scientific paper

10.1002/asna.200510418

Recently an additional technique was applied to investigate the properties of kHz QPOS, i.e. the analysis of the distribution of frequency ratios or frequencies themselves. I review the results of such work on the data from ScoX-1: Abramowicz et al. (2003), which was later criticized by Belloni et al.(2005). I conclude that the findings of the latter paper are consistent with results presented earlier: kHz QPOs cluster around the value corresponding to the frequency ratio of 2/3. I also discuss the random walk model of kHz QPOs and possible future observations needed to verify it.

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