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Gravitational Waves from Color-Magnetic "Mountains" in Neutron Stars
Umeå University, Faculty of Science and Technology, Department of Physics.
2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 109, no 8, 081103- p.Article in journal (Refereed) Published
Abstract [en]

Neutron stars may harbor the true ground state of matter in the form of strange quark matter. If present, this type of matter is expected to be a color superconductor, a consequence of quark pairing with respect to the color and flavor degrees of freedom. The stellar magnetic field threading the quark core becomes a color-magnetic admixture and, in the event that superconductivity is of type II, leads to the formation of color-magnetic vortices. In this Letter, we show that the volume-averaged color-magnetic vortex tension force should naturally lead to a significant degree of nonaxisymmetry in systems such as radio pulsars. We show that gravitational radiation from such color-magnetic "mountains" in young pulsars, such as the Crab and Vela, could be observable by the future Einstein Telescope, thus, becoming a probe of paired quark matter in neutron stars. The detectability threshold can be pushed up toward the sensitivity level of Advanced LIGO if we invoke an interior magnetic field about a factor ten stronger than the surface polar field.

Place, publisher, year, edition, pages
2012. Vol. 109, no 8, 081103- p.
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:umu:diva-59716DOI: 10.1103/PhysRevLett.109.081103ISI: 000307790900003OAI: oai:DiVA.org:umu-59716DiVA: diva2:562862
Available from: 2012-10-26 Created: 2012-09-25 Last updated: 2017-12-07Bibliographically approved

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Samuelsson, Lars

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