title: Gravitational waves from color-magnetic "mountains" in neutron stars.
abstract: 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.
authors.affiliation: Departamento de Física, Universidad de Murcia, E-30100 Murcia, Spain.
authors.forename: K
authors.initials: K
authors.lastname: Glampedakis
authors.forename: D I
authors.initials: DI
authors.lastname: Jones
authors.forename: L
authors.initials: L
authors.lastname: Samuelsson