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Deconfinement signals from pulsar timing

Published online by Cambridge University Press:  12 April 2016

Hovik Grigorian ,
Gevorg Poghosyan ,
Edvard Chubarian  and
David Blaschke
Hovik Grigorian
Affiliation:
Physics Department, Yerevan State University, Alex Manoogian Str. 1, 375025 Yerevan, Armenia
Gevorg Poghosyan
Affiliation:
Physics Department, Yerevan State University, Alex Manoogian Str. 1, 375025 Yerevan, Armenia
Edvard Chubarian
Affiliation:
Physics Department, Yerevan State University, Alex Manoogian Str. 1, 375025 Yerevan, Armenia
David Blaschke
Affiliation:
Fachbereich Physik, Universität Rostock, Universitätsplatz 1, D–18051 Rostock, Germany

Abstract

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The occurence of a quark matter core in rotating compact stars has been investigated within general relativity as a function of both the rotational frequency and the total baryon number. We demonstrate that the deviation of the braking index from n = 3 signals not only the occurence but also the size of a quark matter core in a pulsar. We suggest that in systems with mass accretion onto a rapidly rotating compact star a spin-down to spin-up transition might signal a deconfinement transition in its interior.

Type
Part 9. Population and Neutron Star Properties
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 603 - 604
Copyright
Copyright © Astronomical Society of the Pacific 2000

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