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

Journal Article · Wed Sep 21 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3629493· OSTI ID:21611625

Hakan Erkut, M ^[1]

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1. Physics Department, Istanbul Kueltuer University, Atakoey Campus, Bakirkoey 34156, Istanbul (Turkey)

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.

• OSTI ID: 21611625
• Journal Information: AIP Conference Proceedings, Vol. 1379, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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