Relativistic simulations of the phase-transition-induced collapse of neutron stars

Details Relativistic simulations of the phase-transition-induced collapse of neutron stars Relativistic simulations of the phase-transition-induced collapse of neutron stars

2008-06-10

arxiv.org/abs/0806.1700v2

Mon.Not.Roy.Astron.Soc.394:52-76,2009

Astronomy and Astrophysics

Astrophysics

28 pages, 27 figures. Minor changes to be consistent with published version

Scientific paper

10.1111/j.1365-2966.2008.14056.x

An increase in the central density of a neutron star may trigger a phase transition from hadronic matter to deconfined quark matter in the core, causing it to collapse to a more compact hybrid-star configuration. We present a study of this, building on previous work by Lin et al. (2006). We follow them in considering a supersonic phase transition and using a simplified equation of state, but our calculations are general relativistic (using 2D simulations in the conformally flat approximation) as compared with their 3D Newtonian treatment. We also improved the treatment of the initial phase transformation, avoiding the introduction of artificial convection. As before, we find that the emitted gravitational-wave spectrum is dominated by the fundamental quasi-radial and quadrupolar pulsation modes but the strain amplitudes are much smaller than suggested previously, which is disappointing for the detection prospects. However, we see significantly smaller damping and observe a nonlinear mode resonance which substantially enhances the emission in some cases. We explain the damping mechanisms operating, giving a different view from the previous work. Finally, we discuss the detectability of the gravitational waves, showing that the signal-to-noise ratio for current or second generation interferometers could be high enough to detect such events in our Galaxy, although third generation detectors would be needed to observe them out to the Virgo cluster, which would be necessary for having a reasonable event rate.

Affiliated with

Also associated with

No associations

Rating

Relativistic simulations of the phase-transition-induced collapse of neutron stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Relativistic simulations of the phase-transition-induced collapse of neutron stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relativistic simulations of the phase-transition-induced collapse of neutron stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-175376