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@article{33547,
   author = {Török, Gabriel and Goluchová, Kateřina and Šrámková, Eva and Horák, Jiří and Bakala, Pavel and Urbanec, Martin},
   article_number = {1},
   doi = {http://dx.doi.org/10.1093/mnrasl/slx177},
   keywords = {accretion; accretion discs; stars: neutron; X-rays: binaries},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {On one-parametric formula relating the frequencies of twin-peak quasi-periodic oscillations},
   url = {https://academic.oup.com/mnrasl/article-abstract/473/1/L136/4582893?redirectedFrom=fulltext},
   volume = {473},
   year = {2018}
}

TY  - JOUR
ID  - 33547
AU  - Török, Gabriel - Goluchová, Kateřina - Šrámková, Eva - Horák, Jiří - Bakala, Pavel - Urbanec, Martin
PY  - 2018
TI  - On one-parametric formula relating the frequencies of twin-peak quasi-periodic oscillations
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 473
IS  - 1
SP  - "L136"-"L140"
EP  - "L136"-"L140"
SN  - 0035-8711
KW  - accretion
KW  - accretion discs
KW  - stars: neutron
KW  - X-rays: binaries
UR  - https://academic.oup.com/mnrasl/article-abstract/473/1/L136/4582893?redirectedFrom=fulltext
L2  - https://academic.oup.com/mnrasl/article-abstract/473/1/L136/4582893?redirectedFrom=fulltext
N2  - Twin-peak quasi-periodic oscillations (QPOs) are observed in several low-mass X-ray binary systems containing neutron stars. Timing the analysis of X-ray fluxes of more than dozen of such systems reveals remarkable correlations between the frequencies of two characteristic peaks present in the power density spectra. The individual correlations clearly differ, but they roughly follow a common individual pattern. High values of measured QPO frequencies and strong modulation of the X-ray flux both suggest that the observed correlations are connected to orbital motion in the innermost part of an accretion disc. Several attempts to model these correlations with simple geodesic orbital models or phenomenological relations have failed in the past. We find and explore a surprisingly simple analytic relation that reproduces individual correlations for a group of several sources through a single parameter. When an additional free parameter is considered within our relation, it well reproduces the data of a large group of 14 sources. The very existence and form of this simple relation support the hypothesis of the orbital origin of QPOs and provide the key for further development of QPO models. We discuss a possible physical interpretation of our relation's parameters and their links to concrete QPO models.
ER  - 

TÖRÖK, Gabriel, Kateřina GOLUCHOVÁ, Eva ŠRÁMKOVÁ, Jiří HORÁK, Pavel BAKALA a Martin URBANEC. On one-parametric formula relating the frequencies of twin-peak quasi-periodic oscillations. \textit{Monthly Notices of the Royal Astronomical Society}. 2018, roč.~473, č.~1, s.~''L136''-''L140'', 5 s. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnrasl/slx177.