KOTRLOVÁ, Andrea, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK, Zdeněk STUCHLÍK a Kateřina GOLUCHOVÁ. Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars II. Forced resonances. Astronomy & Astrophysics. 2017, roč. 607, November, s. „A69-1“-„A69-8“, 8 s. ISSN 0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201730585. |
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@article{29866, author = {Kotrlová, Andrea and Šrámková, Eva and Török, Gabriel and Stuchlík, Zdeněk and Goluchová, Kateřina}, article_number = {November}, doi = {http://dx.doi.org/10.1051/0004-6361/201730585}, keywords = {X-rays: binaries; black hole physics; accretion; accretion disks}, language = {eng}, issn = {0004-6361}, journal = {Astronomy & Astrophysics}, title = {Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars II. Forced resonances}, url = {https://www.aanda.org/articles/aa/abs/2017/11/aa30585-17/aa30585-17.html}, volume = {607}, year = {2017} }
TY - JOUR ID - 29866 AU - Kotrlová, Andrea - Šrámková, Eva - Török, Gabriel - Stuchlík, Zdeněk - Goluchová, Kateřina PY - 2017 TI - Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars II. Forced resonances JF - Astronomy & Astrophysics VL - 607 IS - November SP - „A69-1“-„A69-8“ EP - „A69-1“-„A69-8“ SN - 00046361 KW - X-rays: binaries KW - black hole physics KW - accretion KW - accretion disks UR - https://www.aanda.org/articles/aa/abs/2017/11/aa30585-17/aa30585-17.html L2 - https://www.aanda.org/articles/aa/abs/2017/11/aa30585-17/aa30585-17.html N2 - In our previous work ( Paper I) we applied several models of high-frequency quasi-periodic oscillations (HF QPOs) to estimate the spin of the central compact object in three Galactic microquasars assuming the possibility that the central compact body is a superspinning object ( or a naked singularity) with external spacetime described by Kerr geometry with a dimensionless spin parameter a equal to cJ/GM^(2) > 1. Here we extend our consideration, and in a consistent way investigate implications of a set of ten resonance models so far discussed only in the context of a < 1. The same physical arguments as in Paper I are applied to these models, i.e. only a small deviation of the spin estimate from a = 1, a greater than or similar to 1, is assumed for a favoured model. For five of these models that involve Keplerian and radial epicyclic oscillations we find the existence of a unique specific QPO excitation radius. Consequently, there is a simple behaviour of dimensionless frequency M x nu_(U)(a) represented by a single continuous function having solely one maximum close to a greater than or similar to 1. Only one of these models is compatible with the expectation of a greater than or similar to 1. The other five models that involve the radial and vertical epicyclic oscillations imply the existence of multiple resonant radii. This signifies a more complicated behaviour of M x nu_(U)(a) that cannot be represented by single functions. Each of these five models is compatible with the expectation of a greater than or similar to 1. ER -
KOTRLOVÁ, Andrea, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK, Zdeněk STUCHLÍK a Kateřina GOLUCHOVÁ. Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars II. Forced resonances. \textit{Astronomy \&{} Astrophysics}. 2017, roč.~607, November, s.~„A69-1“-„A69-8“, 8 s. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201730585.
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