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Tuesday, May 5, 2020 | History

3 edition of Fragmentation of cosmic-string loops found in the catalog.

Fragmentation of cosmic-string loops

Thomas York

Fragmentation of cosmic-string loops

by Thomas York

  • 338 Want to read
  • 29 Currently reading

Published by Fermi National Accelerator Laboratory, National Aeronautics and Space Administration, National Technical Information Service, distributor in Batavia, IL, [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Cosmology.,
  • Fragmentation.,
  • Loops.,
  • Space-time functions.,
  • String theory.

  • Edition Notes

    Other titlesFragmentation of cosmic string loops.
    StatementThomas York.
    SeriesNASA contractor report -- NASA CR-184892., FERMILAB-pub -- 89/32-A., Fermilab pub -- 89/32-A.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18078312M

    Volume , number 2 PHYSICS LETTERS B 5 June THE STABILITY OF COSMIC STRING LOOPS E.J. COPELAND and N. TUROK The Blackett Laboratory, imperial College, London SW72BZ, UK Received 13 March A general perturbation analysis is performed on closed string loops to investigate whether small perturbations cause the known class of non-self-intersecting loops to self Cited by: 4. Corbyn P. () Cosmic String-Loops and Galaxy Formation — Angular Momentum and the Hubble Sequence. In: Mardirossian F., Giuricin G., Mezzetti M. (eds) Clusters and Groups of Galaxies. Astrophysics and Space Science Library (A Series of Books on the Recent Developments of Space Science and of General Geophysics and Astrophysics Published in Author: Piers Corbyn.

    ical evolution of cosmic strings in based on a formalism introduced by Kibble? The fate of a system of cosmic strings depends on a complicated energy loss A simplified model of cosmic string evolution is used to point out an A different model for the fragmentation of loops is also introduced. Cosmic string loops and large-scale structure P. P. Avelino,1 E. P. S. Shellard,2 J. H. P. Wu,2 and B. Allen3 1Centro de Astrofı´sica, Universidade do Porto, Rua das Estrelas s/n, Porto, Portugal 2Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Silver Street, Cambridge CB3 9EW, United Kingdom 3University of Wisconsin-Milwaukee, Milwaukee, Wisconsin .

    Understanding of the signatures of cosmic string networks is limited by a large uncertainty in the sizes at which cosmic string loops form. We review cosmic string network evolution, and the gravitational signatures, with emphasis on this uncertainty. We then review a Author: Joseph Polchinski. Cosmic Strings and other defects. This guide covers the following topics: Phase transitions in the early universe, Cosmic strings and other topological defects, Cosmic string dynamics and evolution, High-resolution cosmic string simulations, Cosmic strings and .


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Fragmentation of cosmic-string loops by Thomas York Download PDF EPUB FB2

The fragmentation of cosmic string loops is discussed, and the results of a simulation of this process are presented. The simulation can evolve any of a large class of loops essentially exactly Author: Thomas L York.

Get this from a library. Fragmentation of cosmic-string loops. [Thomas York; United States. National Aeronautics and Space Administration.]. The fragmentation of cosmic-string loops is discussed and the results of a simulation of this process are presented.

The simulation can evolve any of a large class of loops essentially exactly, including allowing fragments that collide to join together. Such reconnection enhances the production of small fragments, but not drastically. Prepared for submission to JCAP Early structure formation from cosmic string loops Benjamin Shlaer aAlexander Vilenkin Abraham Loebb aInstitute of Cosmology, Department of Physics & Astronomy, Tufts University, College Avenue, Medford, MAUSA bInstitute for Theory & Computation, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA,USA.

Negative mass cosmic string. The standard model of a cosmic string is a geometrical structure with an angle deficit, which thus is in tension and hence has positive mass.

InVisser et al. proposed that cosmic strings could theoretically also exist with angle excesses, and. Cosmic String Loops, Large and Small Florian Dubath1 Joseph Polchinski2 Kavli Institute for Theoretical Physics University of California Santa Barbara, CA Jorge V.

Rocha3 Department of Physics University of California Santa Barbara, CA Abstract We extend our earlier model of the small scale structure of cosmic string networks.

The fraction of cosmic string loops which collapse to form black holes is estimated using a set of realistic loops generated by loop Fragmentation of cosmic-string loops book.

The smallest radius sphere into which each cosmic string loop may fit is obtained by monitoring the loop through one period of oscillation.

Meanwhile Olum and others have run computer simulations showing that, if this prediction holds true, there should be at least a billion cosmic string. Gravitational radiation from realistic cosmic string loops: Authors:fragmenting into two child loops.

The fragmentation of the child loops is followed recursively until only non-self-intersecting loops remain. The properties of the final non-self-intersecting loops are found to be independent of the initial conditions of the parent loops. The resulting figures all depend on the particular theory that's employed, but a good rule of thumb is that 1 inch ( centimeters) of cosmic string has about the Author: Paul Sutter.

A cosmic-string network in an expanding universe evolves by losing energy to loops which in turn oscillate and emit gravitational radiation.

The power radiated at a frequency corresponding to the {ital n}th fundamental mode of oscillation of the loop is characterized by a dimensionless constant {ital P}{sub {ital n}}, with the total power radiated being proportional to {gamma}= t{ital sum.

Cosmic string networks offer one of the best prospects for detection of cosmological gravitational waves (GWs). The combined incoherent GW emission of a large number of string loops leads to a.

Cosmic Strings: The Current Status/Proceedings of the Yale Cosmic String Workshop Yale University, MayFrank S. Accetta, Lawrence Maxwell Krauss World Scientific, - Science - pages.

Cosmic strings have certain remarkable properties that could have caused them to survive to the present day. There are several ways to detect cosmic strings. When a cosmic string is formed during one of the phase transitions, it creates a wedge in space-time.

Light that passes a cosmic string is deformed due to the gravity exerted by the Size: KB. 2 Cosmic string loop radiation spectrum The spectrum of gravitational radiation emitted by a network of cosmic string loops is obtained using a background Ω = 1 FRW cosmological model, an extended one-scale model for the evolution of a network of cosmic strings, and a model of the emission of gravitational radiation by cosmic string loops.

TheFile Size: KB. DO COSMIC STRINGS EXIST. Cosmic strings are objects that may have formed in the early Universe, but scientists are still searching for evidence that they exist. They were first introduced by theoretical physicist Tom W. Kibble in the late 70s as a possible result of some field theories, including the famous Higgs theory.

They are one-dimensionalFile Size: KB. @article{osti_, title = {Cosmic string loops in the expanding universe}, author = {Olum, Ken D and Vanchurin, Vitaly and Arnold Sommerfeld Center for Theoretical Physics, Department fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Theresienstr.

37, D, Munich}, abstractNote = {We study the production of loops in the cosmic string network in the expanding background by means. Early structure formation from cosmic string loops Benjamin Shlaer 1, Alexander Vilenkin, Abraham Loeb2 1Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, MAUSA 2Harvard-Smithsonian Center for Astrophysics, 60.

cosmic string model accurately predicts the correlation function of Abell’ s rich clusters of galaxies, and is the only theory of galaxy formation to do so. so that the fragmentation of the loops will be truncated when the average loop size is not much smaller than the horizon, much too large to decay into heavy particles.

The only option. ‘Cosmic string’ formed at the mass scale of GUT (grand unified theory) symmetry breaking (Mx ≊ 2×lGeV) is typified by a mass per unit length μG/c2 - Author: S.T. Chase. Loop production from a cosmic string. Cosmic strings are astronomically long, microphysically thin filaments which may exist in our universe.

When strings intersect themselves, they can reconnect and so chop off moving loops, which may be observable sources of cosmic rays or gravitational waves.Cosmic String Loop Distribution with a Gravitational Wave Cuto Larissa Lorenz Institute of Mathematics and Physics Centre for Cosmology, Particle Physics and Phenomenology (CP3) Universit e Catholique de Louvain la Neuve work with C.

Ringeval and M. Sakellariadou JCAP [arXiv].I'll Hold It Down For You: A Hood Love Affair Part 5 Stay Down (Paperback) by Royalty K I N G McCall and a great selection of related books, art and collectibles available now at