D
2014
HF QPOs in the neutron star binary system XTE J1701-462 fitted by the model of oscillating string loops
KOLOŠ, Martin and Zdeněk STUCHLÍK
Basic information
Original name
HF QPOs in the neutron star binary system XTE J1701-462 fitted by the model of oscillating string loops
Edition
Opava, Proceedings of RAGtime 14-16: Workshops on black holes and neutron stars, p. 235-247, 13 pp. 2014
Publisher
Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky
Other information
Type of outcome
Stať ve sborníku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
string loops; quasiperiodic oscillations; X-ray binary; XTE J1701-462
Tags
International impact
Links
EE2.3.20.0071, research and development project. GB14-37086G, research and development project.
V originále
Axisymmetric string loops oscillating around a stable equilibrium position in the Kerr background are applied to explain the special set of frequencies related to the high-frequency quasiperiodic oscillations observed in the low mass X-ray binary XTE J1701-462 containing a neutron star. Frequencies of the radial and vertical string loop oscillations are determined by the mass M and dimensionless spin a of the neutron star, and by dimensionless parameter ! describing combined effects of the string loop tension and its angular momentum. Equilibrium position of the string loop is given by its angular momentum and energy. The string-loop oscillation model can explain the observed kHz frequencies, but the stringy parameter ! cannot be the same for all the three HF QPO observations in the XTE J1701-462 source; the limits on the acceptable values of ! are given in dependence on the spacetime parameters M and a. However, the model implies restriction M > 3.3M_{sun} on the neutron star mass tha
Displayed: 25/12/2024 19:50