Quark deconfinement in neutron star cores: the effects of spin-down

  title={Quark deconfinement in neutron star cores: the effects of spin-down},
  author={Jan E. Staff and Rachid Ouyed and Prashanth Jaikumar},
  journal={The Astrophysical Journal},
We study the role of spin-down in driving quark deconfinement in the high-density cores of isolated neutron stars. Assuming spin-down to be solely due to magnetic braking, we obtain typical timescales to quark deconfinement for neutron stars that are born with Keplerian frequencies. Employing different equations of state (EOSs), we determine the minimum and maximum neutron star masses that will allow for deconfinement via spin-down only. We find that the time to reach deconfinement is strongly… Expand

Figures and Tables from this paper

The existence of deconfined quark matter in the superdense interior of neutron stars is a key question that has drawn considerable attention over the past few decades. Quark matter can comprise anExpand
Contraction of cold neutron star due to in the presence a quark core
Motivated by importance of the existence of quark matter on structure of neutron star. For this purpose, we use a suitable equation of state (EoS) which include three different parts: (i) a layerExpand
Vortex Dynamics in Color-Superconducting Quark stars: The Re-heating of Magnetars
Compact stars made of quark matter rather than confined hadronic matter, are expected to form a color superconductor. This superconductor ought to be threaded with rotational vortex lines withinExpand
Spindown of Isolated Neutron Stars: Gravitational Waves or Magnetic Braking?
We study the spindown of isolated neutron stars from initially rapid rotation rates, driven by two factors: (i) gravitational wave emission due to r-modes and (ii) magnetic braking. In the context ofExpand
Nucleosynthesis in neutron-rich ejecta from quark-novae
We explore heavy-element nucleosynthesis by rapid neutron capture (r-process) in the decompressing ejecta from the surface of a neutron star. The decompression is triggered by a violent phaseExpand
We examine the case for quark-novae (QNe) as possible sources for the reionization and early metal enrichment of the universe. QNe are predicted to arise from the explosive collapse (and conversion)Expand
Quark-novae in neutron star - white dwarf binaries: a model for luminous (spin-down powered) sub-Chandrasekhar-mass Type Ia supernovae?
We show that, by appealing to a Quark-Nova (QN) in a tight binary system containing a massive neutron star and a CO white dwarf (WD), a Type Ia explosion could occur. The QN ejecta collides with theExpand
Quark-Novae Ia in the Hubble diagram: implications for dark energy
The accelerated expansion of the Universe was proposed through the use of Type-Ia supernovae (SNe) as standard candles. The standardization depends on an empirical correlation between theExpand
Quark Nova Model for Fast Radio Bursts
FRBs are puzzling, millisecond, energetic radio transients with no discernible source; observations show no counterparts in other frequency bands. The birth of a quark star from a parent neutron starExpand
Quark-nova remnants - II. The degenerate torus case with applications to AXPs
In the first paper of this series we explored the case where a quark-nova ejecta forms a degenerate shell, supported by the star's magnetic field. Herein, we consider the case where the ejecta hasExpand


Skyrmion Stars: Astrophysical Motivations and Implications
We study mass-radius relations for compact stars employing an equation of state (EOS) of dense matter based on a Skyrme fluid. The zero-temperature mean-field model is based on mesonic excitations,Expand
Quark-Nova as Gamma Ray Burst Precursor
We explore the scenario where the core of a neutron star (having experienced a transition to an up and down quark phase) shrinks into the equilibrated quark object after reaching strange quark matterExpand
Signal of Quark Deconfinement in the Timing Structure of Pulsar Spin-Down
(May, 12, 1997)The conversion of nuclear matter to quark matter in thecore of a rotating neutron star alters its moment of inertia.Hence the epoch over which conversion takes place will be sig-naledExpand
▪ Abstract We review recent progress in the theory of neutron stars and compare its predictions with the observational data on masses, radii, and temperatures. The theory of neutron stars made up ofExpand
Strange quark matter and compact stars
Abstract Astrophysicists distinguish between three different kinds of compact stars. These are white dwarfs, neutron stars, and black holes. The former contain matter in one of the densest formsExpand
Ultra-High-Energy Cosmic Rays from Hypothetical Quark Novae
We explore the acceleration of ions in the quark nova (QN) scenario, in which a neutron star experiences an explosive phase transition into a quark star (born in the propeller regime). In thisExpand
Fireballs from Quark Stars in the Color-Flavor Locked Phase: Application to Gamma-Ray Bursts
Recent studies of photon generation mechanisms in the color-superconducting color-flavor locked (CFL) phase of dense quark matter have found γ-ray emissivities in excess of ~1050 ergs cm-3 s-1 forExpand
Neutrino emission and mass ejection in quark novae
We explore the role of neutrinos in a quark nova explosion. We study the production of neutrinos during this event, their propagation, and their interactions with the surrounding quark matter and theExpand
Equation of state of nucleon matter and neutron star structure
Properties of dense nucleon matter and the structure of neutron stars are studied using variational chain summation methods and the new Argonne ${v}_{18}$ two-nucleon interaction, which provides anExpand
Strange stars with realistic quark vector interaction and phenomenological density-dependent scalar potential [Phys. Lett. B 438 (1998) 123]
Abstract We derive an equation of state (EOS) for strange matter, starting from an interquark potential which (i) has asymptotic freedom built into it, (ii) shows confinement at zero density (ρB=0)Expand