Twin peak quasi-periodic oscillations as signature of oscillating cusp torus

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00471579" target="_blank" >RIV/67985815:_____/16:00471579 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1093/mnrasl/slv196" target="_blank" >http://dx.doi.org/10.1093/mnrasl/slv196</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnrasl/slv196" target="_blank" >10.1093/mnrasl/slv196</a>

Result language

angličtina

Original language name

Twin peak quasi-periodic oscillations as signature of oscillating cusp torus

Original language description

Serious theoretical effort has been devoted to explain the observed frequencies of twin-peak quasi-periodic oscillations (HF QPOs) observed in low-mass X-ray neutron star binaries. Here we propose a new model of HF QPOs. Within its framework we consider an oscillating torus with cusp that changes location r(0) of its centre around radii very close to innermost stable circular orbit. The observed variability is assigned to global modes of accreted fluid motion that may give strong modulation of both accretion disc radiation and the accretion rate. For a given space-time geometry, the model predicts that QPO frequencies are function of single parameter r(0). We illustrate that the model can provide fits of data comparable to those reached by other models, or even better. In particular, it is compared to relativistic precession model. Moreover, we also illustrate that the model consideration is compatible with consideration of models of a rotating neutron star in the atoll source 4U 1636-53.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/LH14049" target="_blank" >LH14049: Spectral and timing properties of cosmic black holes</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Volume of the periodical

457

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

5

Pages from-to

"L19"-"L23"

UT code for WoS article

000378094600005

EID of the result in the Scopus database

2-s2.0-84960089155