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Effect of spin on mass and radius of neutron stars
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- Author / Creator
- Calderon Noguez, Jorge
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Neutron stars are some of the densest objects in the Universe, with densities in their cores that are larger than that of the atomic nucleus. Their relatively small size allows them to spin very rapidly, with speeds at the equator that are a large fraction of the speed of light. Being some of the densest objects in existence, it is understandable that we want to know what they are made of. Different proposals have been made leading to various equations to describe the state of matter inside, also known as equation of state (EOS), but there is no conclusive evidence proving that one EOS is correct. In this work, we show simulations for the rotational evolution of various neutron stars from a static state to their maximum spin frequencies for different EOS. We show the fractional increase in mass, M, and radius, R, during the spin-up process of these rapidly rotating objects. We also find quasi-universal relations that depend on the dimensionless quantities of compactness (GM/Rc^2) and the squared value of angular velocity (w^2R^3/GM) that are almost independent of the EOS used.
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- Subjects / Keywords
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- Graduation date
- Fall 2019
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- Type of Item
- Thesis
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- Degree
- Master of Science
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- License
- Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.