D
2007
On mutual relation of kHz QPOs
BAKALA, Pavel, Zdeněk STUCHLÍK and Gabriel TÖRÖK
Basic information
Original name
On mutual relation of kHz QPOs
Edition
Opava, Proceedings of RAGtime 8/9: Workshops on black holes and neutron stars, p. 501-510, 9 pp. 2007
Publisher
Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky
Other information
Type of outcome
Stať ve sborníku
Field of Study
10308 Astronomy
Country of publisher
Czech Republic
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
X-rays, binaries, neutron stars, accretion discs
Tags
International impact
Links
LC06014, research and development project. MSM4781305903, plan (intention).
V originále
In this note we report on the recent analysis of occurrences and properties of kHz QPOs in the source 4U 1636-53. We find a prominent frequency (or a narrow frequency region) that separates upper and lower QPO observations. The two QPO modes are then simultaneously detected mainly in the vicinity of this transition points. We show that this can be understood in terms of correlations of QPO properties with frequency, such as quality factor and rms amplitude. We find that rms amplitudes and quality factors of both QPOs nearly equal at the transition point. In addition, the QPO frequencies are nearly commensurable there.
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