Spin clustering of accreting X-ray neutron stars as possible evidence of quark matter

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A neutron star in binary orbit with a low-mass non-degenerate companion becomes a source of x-rays with millisecond variability when mass accretion spins it up. Centrifugally driven changes in density profile may initiate a phase transition in a growing region of the core parallel to what may take place in an isolated millisecond pulsar, but in reverse. Such a star will spend a longer time in the spin frequency range over which the transition occurs than elsewhere because the change of phase, paced by the spinup rate, is accompanied by a growth in the moment of inertia. The population of ... continued below

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5 pages

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Glendenning, Norman K. & Weber, Fridolin June 27, 2001.

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A neutron star in binary orbit with a low-mass non-degenerate companion becomes a source of x-rays with millisecond variability when mass accretion spins it up. Centrifugally driven changes in density profile may initiate a phase transition in a growing region of the core parallel to what may take place in an isolated millisecond pulsar, but in reverse. Such a star will spend a longer time in the spin frequency range over which the transition occurs than elsewhere because the change of phase, paced by the spinup rate, is accompanied by a growth in the moment of inertia. The population of accreters will exhibit a clustering in the critical frequency range. A phase change triggered by changing spin and the accompanying adjustment of moment of inertia has its analogue in rotating nuclei.

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5 pages

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INIS; OSTI as DE00791198

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  • International Conference on Nuclear Physics, Berkeley, CA (US), 07/30/2001--08/03/2001

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  • Report No.: LBNL--48389
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 791198
  • Archival Resource Key: ark:/67531/metadc742886

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  • June 27, 2001

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  • Oct. 19, 2015, 7:39 p.m.

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  • April 4, 2016, 2:27 p.m.

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Glendenning, Norman K. & Weber, Fridolin. Spin clustering of accreting X-ray neutron stars as possible evidence of quark matter, article, June 27, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc742886/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.