KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ and Gabriel TÖRÖK. Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars. Astronomy & Astrophysics. FR - Francouzská republika, 2014, vol. 572, December, p. "A79 - 1"-"A79 - 6", 6 pp. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201424407. |
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@article{42725, author = {Kotrlová, Andrea and Stuchlík, Zdeněk and Šrámková, Eva and Török, Gabriel}, article_location = {FR - Francouzská republika}, article_number = {December}, doi = {http://dx.doi.org/10.1051/0004-6361/201424407}, 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}, url = {http://www.aanda.org/articles/aa/abs/2014/12/aa24407-14/aa24407-14.html}, volume = {572}, year = {2014} }
TY - JOUR ID - 42725 AU - Kotrlová, Andrea - Stuchlík, Zdeněk - Šrámková, Eva - Török, Gabriel PY - 2014 TI - Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars JF - Astronomy & Astrophysics VL - 572 IS - December SP - "A79 - 1"-"A79 - 6" EP - "A79 - 1"-"A79 - 6" SN - 00046361 KW - X-rays: binaries KW - black hole physics KW - accretion, accretion disks UR - http://www.aanda.org/articles/aa/abs/2014/12/aa24407-14/aa24407-14.html N2 - We have previously applied several models of high-frequency quasi-periodic oscillations (HF QPOs) to estimate the spin of the central Kerr black hole in the three Galactic microquasars, GRS 1915+105, GRO J1655-40, and XTE J1550-564. Here we explore the alternative possibility that the central compact body is a super-spinning object (or a naked singularity) with the external space-time described by Kerr geometry with a dimensionless spin parameter a equiv cJ/GM^2 > 1. We calculate the relevant spin intervals for a subset of HF QPO models considered in the previous study. Our analysis indicates that for all but one of the considered models there exists at least one interval of a > 1 that is compatible with constraints given by the ranges of the centralcompact object mass independently estimated for the three sources. For most of the models, the inferred values of a are several times higher than the extreme Kerr black hole value a = 1. These values may be too high since the spin of supe ER -
KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ and Gabriel TÖRÖK. Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2014, vol.~572, December, p.~''A79 - 1''-''A79 - 6'', 6 pp. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201424407.
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