Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 132 for “"Neutron Star"”.
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Neutron Star Electromagnetic Field Structure
<p>This dissertation investigates the neutron star magnetic field from generation to radiation production. We have investigated the spontaneous magnetization process to explain the magnetic field generation. This magnetization is then applied to determine the electromagnetic field structure of the …
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Properties of Neutron Star Critical Collapses
… thesis seeks to understand the properties of the neutron star critical solution, understand the properties of the threshold in the solution space of the Einstein field equations between the black hole and a neutron star phases, and clarify the implication these results on realistic astrophysical …
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Pulse timing and neutron star structure
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-06T15:36:50Z No. of bitstreams: 1 1985_nandkumar.pdf: 3440297 bytes, checksum: 2b2f05ec0073943c2c64c3c2f89f1bd3 (MD5)
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Effects of Spin on Neutron-Star Observations
Measurements of neutron-star properties provide a natural way to test models of cold dense matter and theories of gravity. In order to correctly interpret these measurements, accurate models taking into account the special and general relativistic effects arising from the strong gravity and fast …
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Neutron Star Models in Alternative Theories of Gravity
<p>We study the structure of neutron stars in a broad class of alternative theories of gravity. In particular, we focus on Scalar-Tensor theories and <italic>f(R)<italic> theories of gravity. We construct static and slowly rotating numerical star models for a set of equations of state, including a …
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Superfluid neutron star dynamics, mutual friction and turbulence
… thesis investigates the role of superfluidity in neutron stars and associated phenomena. We model the internal fluid of a neutron star as a two-component system: one of charged particles and one of superfluid neutrons. We derive a set of multi-constituent hydrodynamic equations that allows for a …
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Numerical simulations of neutron star - black hole mergers
Collisions of black holes and neutron stars, named mixed binaries in the following, are interesting because of at least two reasons. Firstly, it is expected that they emit a large amount of energy as gravitational waves, which could be measured by new detectors. The form of those waves is expected …
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THE EFFECT OF COMPACT OBJECT SPIN ON THE SEARCH FOR GRAVITATIONAL WAVES FROM BINARY NEUTRON STAR AND NEUTRON STAR-BLACK HOLE MERGERS
… gravitational-wave searches for </p> <p>binary neutron star and neutron star - black hole coalescences. </p> <p>We determine the accuracy of post-Newtonian approximations as gravitational-wave</p> <p>templates in matched-filter based searches for NSBH mergers.</p> <p>We test a geometric method …
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Critical Phenomena in Gravitational Collapses of Neutron Star Systems
… of state: EOS) commonly used in describing neutron star matter may undergo critical collapses. To the best of our knowledge, this is the first study showing that critical collapses can occur without postulating an exotic EOS. We further showed that the critical collapses can occur due to an …
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General relativistic magnetohydrodynamic simulations of binary neutron star mergers
… relativistic magnetohydrodynamic (GRMHD) binary neutron star merger (BNS) simulations, conducted by using the numerical code "Whisky" under various conditions, such as, different Equation of State (EOS) for neutron matter (APR4, Ideal fluid and H4 EOSs), masses (with equal/unequal masses for two …
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Proton deceleration near the surface on an accreting neutron star
In binary X-ray sources consisting of a neutron star accreting matter from a companion star, Xradiation is produced by the layer of hot, dense plasma that develops where the matter collides with the neutron star surface. The structure of this layer and the spectrum of the radiation produced there …
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Proton deceleration near the surface of an accreting neutron star
In binary X-ray sources consisting of a neutron star accreting matter from a companion star, X-radiation is produced by the layer of hot, dense plasma that develops where the matter collides with the neutron star surface. The structure of this layer and the spectrum of the radiation produced there …
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Observational and evolutionary studies of neutron star X-ray binaries
… our observational and evolutionary studies of neutron stars in X-ray binary systems. A variety of topics are discussed, which are all related by a single scientific theme, namely, helping to set constraints on the mass-radius relation of neutron stars, and hence on their equations of state …
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The accretion process in neutron-star low-mass X-ray binaries
… problems in the spectral studies of accreting neutron stars (NSs) in low-mass X-ray binaries involving the X-ray spectral decomposition, the relations between subtypes (mainly atoll and Z sources), and the origins of different X- ray states. Atoll sources are less luminous and have both hard …
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Gravity wave signals from relativistic calculations of binary neutron star coalescence
… wave signature produced by coalescing neutron star binary systems. Additionally, we have studied the properties of remnants which may be formed during the merger process. We have introduced a hybrid post-Newtonian formalism, which treats lowest order 1PN relativistic terms at a reduced …
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X-ray spectroscopy of neutron star low-mass X-ray binaries
… work spanning a variety of topics relating to neutron star lowmass X-ray binaries (LMXBs) and utilize spectral information from X-ray observations to further our understanding of these sources. First, I give an overview of important X- ray astrophysics relevant to the work I present in …
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Probing the phases of cold ultra-dense matter using neutron star physics
… are unknown. Since the density at the core of a neutron star can be as high as a few times the nuclear saturation density, it is the most likely place to find these exotic forms of matter in the real world. The main goal of this thesis is to probe the phases of cold dense matter using neutron …
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Eccentricity of Merging Neutron Star Binaries: Searches, Parameter Estimation, and Future Prospects
<p>Since the start of the first observing run the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Advanced Virgo observatory have detected 48 binary black hole mergers and two binary neutron star mergers. Knowledge about the properties of the binary can be gained from …
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