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Title: High-Frequency QPOs as a Product of Inner Disk Dynamics around Neutron Stars

Abstract

The kHz QPOs observed in a neutron star low mass X-ray binary are likely to be produced in the innermost regions of accretion disk around the neutron star. The rotational dynamics of the inner disk can be characterized by the presence of either sub-Keplerian or super-Keplerian accretion flow depending on the relative fastness of the neutron spin as compared to the Keplerian frequency at the inner disk radius. Within the magnetosphere-disk interaction model, the frequency difference between the two kHz QPOs observed in a given source can be estimated to be slightly higher than or nearly around the neutron star spin frequency if the neutron star is a slow rotator and less than the stellar spin frequency if the neutron star is a fast rotator.

Authors:
 [1]
  1. Physics Department, Istanbul Kueltuer University, Atakoey Campus, Bakirkoey 34156, Istanbul (Turkey)
Publication Date:
OSTI Identifier:
21611625
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1379; Journal Issue: 1; Conference: Conference on astrophysics of neutron stars 2010: A conference in honor of M. Ali Alpar, Izmir (Turkey), 2-6 Aug 2010; Other Information: DOI: 10.1063/1.3629493; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCRETION DISKS; ASTROPHYSICS; BINARY STARS; FREQUENCY MEASUREMENT; KHZ RANGE; MAGNETOHYDRODYNAMICS; MASS; NEUTRON STARS; NEUTRONS; OSCILLATIONS; SPIN; X RADIATION; ANGULAR MOMENTUM; BARYONS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; FLUID MECHANICS; FREQUENCY RANGE; HADRONS; HYDRODYNAMICS; IONIZING RADIATIONS; MECHANICS; NUCLEONS; PARTICLE PROPERTIES; PHYSICS; RADIATIONS; STARS

Citation Formats

Hakan Erkut, M. High-Frequency QPOs as a Product of Inner Disk Dynamics around Neutron Stars. United States: N. p., 2011. Web. doi:10.1063/1.3629493.
Hakan Erkut, M. High-Frequency QPOs as a Product of Inner Disk Dynamics around Neutron Stars. United States. doi:10.1063/1.3629493.
Hakan Erkut, M. Wed . "High-Frequency QPOs as a Product of Inner Disk Dynamics around Neutron Stars". United States. doi:10.1063/1.3629493.
@article{osti_21611625,
title = {High-Frequency QPOs as a Product of Inner Disk Dynamics around Neutron Stars},
author = {Hakan Erkut, M.},
abstractNote = {The kHz QPOs observed in a neutron star low mass X-ray binary are likely to be produced in the innermost regions of accretion disk around the neutron star. The rotational dynamics of the inner disk can be characterized by the presence of either sub-Keplerian or super-Keplerian accretion flow depending on the relative fastness of the neutron spin as compared to the Keplerian frequency at the inner disk radius. Within the magnetosphere-disk interaction model, the frequency difference between the two kHz QPOs observed in a given source can be estimated to be slightly higher than or nearly around the neutron star spin frequency if the neutron star is a slow rotator and less than the stellar spin frequency if the neutron star is a fast rotator.},
doi = {10.1063/1.3629493},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1379,
place = {United States},
year = {2011},
month = {9}
}