J
2008
Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53
ABRAMOWICZ, Marek, Pavel BAKALA, Zdeněk STUCHLÍK and Gabriel TÖRÖK
Basic information
Original name
Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53
Name (in English)
Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53
Edition
Acta Astronomica, PL - Polská republika, 2008, 0001-5237
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Institute of physics in Opava
Keywords in English
QPO, frequency ratio
Tags
International impact, Reviewed
Links
LC06014, research and development project. MSM4781305903, plan (intention).
V originále
We find that the distribution of the ratio of actually observed pairs of kHz QPO frequencies is peaked close to the 3/2 value, and possibly also close to the 5/4 ratio. To resolve the apparent contradiction between the two studies, we examine in detail the frequency distributions of the lower kHz QPO and the upper kHz QPO detected in our data set. We demonstrate that for each of the two kHz QPOs (the lower or the upper), the frequency distribution in all detections of a QPO differs from the distributionof frequency of the same QPO in the subset of observations where both the kHz QPOs are detected. We conclude that detections of individual QPOs alone should not be used for calculation of the distribution of the frequency ratios.
In English
We find that the distribution of the ratio of actually observed pairs of kHz QPO frequencies is peaked close to the 3/2 value, and possibly also close to the 5/4 ratio. To resolve the apparent contradiction between the two studies, we examine in detail the frequency distributions of the lower kHz QPO and the upper kHz QPO detected in our data set. We demonstrate that for each of the two kHz QPOs (the lower or the upper), the frequency distribution in all detections of a QPO differs from the distributionof frequency of the same QPO in the subset of observations where both the kHz QPOs are detected. We conclude that detections of individual QPOs alone should not be used for calculation of the distribution of the frequency ratios.
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