D
2014
String loop oscillation model applied to the twin HF QPOs in the atoll source 4U 1636-53
KOLOŠ, Martin and Zdeněk STUCHLÍK
Basic information
Original name
String loop oscillation model applied to the twin HF QPOs in the atoll source 4U 1636-53
Edition
Opava, Proceedings of RAGtime 10-13: Workshops on black holes and neutron stars, p. 197-209, 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 loop oscillations; X-ray variability; HF QPO observations
Tags
International impact, Reviewed
Links
EE2.3.20.0071, research and development project. GB14-37086G, research and development project.
V originále
The current-carrying string loops oscillating around a stable equilibrium position in the Kerr background are considered to explain the twin high-frequency quasiperiodic oscillations (HF QPOs) observed in the low-mass X-ray binary 4U 1636-53 containing aneutron star. The frequencies of the radial and vertical string loop oscillations are governed by the mass and spin parameters of the neutron star, and by the string parameter describing combined effects of its tension and angular momentum. The frequencies of the radial and vertical modes of the string loop oscillations can cover the large scatter of the twin HF QPO data observed in the 4U 1636-53 source, but the estimates of the mass M and spin a of the neutron star are rather high, M 2:65 M and a 0:45, while related to the theory of the neutron star structure. Therefore, the string loop oscillation model in the case of the 4U 1636-53 source requires a correction based on an electrically charged string loop interacting with the magnet
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