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@inproceedings{77839,
author = {Klimovičová, Kateřina and Lančová, Debora and Török, Gabriel},
address = {Opava},
booktitle = {Proceedings of RAGtime 23-25: Workshops on black holes and neutron stars},
keywords = {Black hole; neutron star; rapid variability; X–ray binary},
howpublished = {tištěná verze "print"},
language = {eng},
location = {Opava},
isbn = {978-80-7510-577-6},
pages = {55-65},
publisher = {Slezská univerzita v Opavě, Fyzikální ústav v Opavě},
title = {Signal from neutron star obscured by oscillating accretion torus},
url = {https://proceedings.physics.cz/wp-content/uploads/2023/12/23_25_07_kli.pdf},
year = {2023}
}
TY - JOUR
ID - 77839
AU - Klimovičová, Kateřina - Lančová, Debora - Török, Gabriel
PY - 2023
TI - Signal from neutron star obscured by oscillating accretion torus
PB - Slezská univerzita v Opavě, Fyzikální ústav v Opavě
CY - Opava
SN - 9788075105776
KW - Black hole
KW - neutron star
KW - rapid variability
KW - X–ray binary
UR - https://proceedings.physics.cz/wp-content/uploads/2023/12/23_25_07_kli.pdf
N2 - X-ray fluxes of low-mass neutron star binaries reveal rapid, nearly periodic changes corresponding to frequencies in the order of hundreds of hertz. Two closely related peaks often appear in the power spectral density and are designated as twin-peak Quasi-Periodic Oscillations (QPOs). Some QPO models attribute the observed effects to the torus oscillating in the inner region of the accretion flow. Since the observed variability is very strong, oscillations of a torus can be reflected in the observed light curves either by modulation of an accretion flow and/or by a periodic obscuration of a hot region on the neutron star surface. Applying a self-consistent description of the oscillations and full relativistic ray tracing, we analyse how the obscuration effect can affect the light curve detected by a distant observer. Within the same paradigm, we also investigate a possible product of torus instability and the implied signature of the Keplerian frequency in the light curve.
ER -
KLIMOVIČOVÁ, Kateřina, Debora LANČOVÁ a Gabriel TÖRÖK. Signal from neutron star obscured by oscillating accretion torus. In \textit{Proceedings of RAGtime 23-25: Workshops on black holes and neutron stars}. Opava: Slezská univerzita v Opavě, Fyzikální ústav v Opavě, 2023, s.~55-65. ISBN~978-80-7510-577-6.
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