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

Language

English

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

ISBN

978-80-7510-124-2

ISSN

Keywords in English

string loop oscillations; X-ray variability; HF QPO observations

Tags

Tags

International impact, Reviewed

Links

EE2.3.20.0071, research and development project. GB14-37086G, research and development project.
Změněno: 26/1/2021 14:08, Mgr. Pavlína Jalůvková

Abstract

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