Phase transition effects on the dynamical stability of hybrid neutron stars

Abstract

We study radial oscillations of hybrid non-rotating neutron stars composed by a quark matter core and hadronic external layers. At first, we physically deduce the junction conditions that should be imposed between two any phases in these systems when perturbations take place. Then we compute the oscillation spectrum focusing on the effects of slow and rapid phase transitions at the quark-hadron interface. We use a generic MIT bag model for quark matter and a relativistic mean field theory for hadronic matter. In the case of rapid transitions at the interface we find a general relativistic version of the reaction mode which has similar properties as its classical counterpart. We also show that the usual static stability condition $\partial M/\partial {\rho }_c\ge 0$, where ${\rho }_c$ is the central density of a star whose total mass is $M$, remains always true for rapid transitions but breaks down in general for slow transitions. In fact, for slow transitions we find that the frequency of the fundamental mode can be a real number (indicating stability) even for some branches of stellar models that verify $\partial M/\partial {\rho }_c\le 0$. Thus, when secular instabilities are suppressed, as expected below some critical stellar rotation rate, it would be possible the existence of twin or even triplet stars with the same gravitational mass but different radii, with one of the counterparts having $\partial M/\partial {\rho }_c\le 0$. We explore some astrophysical consequences of these results.

14 pages, 15 figures. Minor changes. Version accepted for publication in ApJ

References in corpus (14)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
• A new quark-hadron hybrid equation of state for astrophysics - I. High-mass twin compact stars
• Compact stars with sequential QCD phase transitions
• High-mass twin stars with a multi-polytrope EoS
• Effects of color superconductivity on the nucleation of quark matter in neutron stars
• Region of hadron-quark mixed phase in hybrid stars
• Surface tension of highly magnetized degenerate quark matter
• Nucleating quark droplets in the core of magnetars
• Strong first-order phase transition in a rotating neutron star core and the associated energy release
• Stability of thin-shell interfaces inside compact stars
• Radial stability in stratified stars

Cited by in corpus (94)

• Observations of Protoplanetary Disk Structures
• Dust growth and evolution in protoplanetary disks
• Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
• Unified Interacting Quark Matter and its Astrophysical Implications
• Equilibrium, radial stability and non-adiabatic gravitational collapse of anisotropic neutron stars
• Holographic compact stars meet gravitational wave constraints
• Delta baryons and diquark formation in the cores of neutron stars
• Constraining strangeness in dense matter with GW170817
• Neutron stars in $f(R,T)$ gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology
• Discontinuity gravity modes in hybrid stars: assessing the role of rapid and slow phase conversions
• On the nature of the mass-gap object in the GW190814 event
• $g$-modes of neutron stars with hadron-to-quark crossover transitions
• Dark matter effects on hybrid star properties
• Magnetised hybrid stars: effects of slow and rapid phase transitions at the quark-hadron interface
• Quasi-normal g-modes of neutron stars with quarks
• A reliable description of the radial oscillations of compact stars
• Sound velocity in dense stellar matter with strangeness and compact stars
• Tidal deformations of hybrid stars with sharp phase transitions and elastic crusts
• A model-agnostic analysis of hybrid stars with reactive interfaces
• Phase diagram and compact stars in a holographic QCD model
• Probing hybrid stars with gravitational waves via interfacial modes
• Hypermassive quark cores
• Probing elastic quark phases in hybrid stars with radius measurements
• Two first-order phase transitions in hybrid compact stars: higher-order multiplet stars, reaction modes and intermediate conversion speeds
• Framework for phase transitions between the Maxwell and Gibbs constructions
• Relativistic hybrid stars with sequential first-order phase transitions in light of multimessenger constraints
• The equation of state and radial oscillations of neutron stars
• Compact stars in Rastall gravity: hydrostatic equilibrium and radial pulsations
• Could a slow stable hybrid star explain the central compact object in HESS~J1731-347?
• Impact of slow conversions on hybrid stars with sequential QCD phase transitions
• Oscillating magnetised hybrid stars under the magnifying glass of multi-messenger observations
• XTE J1814-338: A potential hybrid star candidate
• Asteroseismology using quadrupolar f-modes revisited: breaking of universal relationships in the slow hadron-quark conversion scenario
• Contraction of cold neutron star due to in the presence a quark core
• Constraining mass, radius and tidal deformability of compact stars with axial wI modes: new universal relations including slow stable hybrid stars
• Simulating Binary Neutron Stars with Hybrid Equation of States: Gravitational Waves, Electromagnetic Signatures, and Challenges for Numerical Relativity
• Probing hadron-quark phase transition in twin stars using $f$-modes
• Breaking of universal relationships of axial wI-modes in hybrid stars: rapid and slow hadron-quark conversion scenarios
• How the QCD trace anomaly behaves at the core of twin stars?
• Hybrid Strangeon Stars
• Radial Mode Stability of Two-Fluid Neutron Stars
• Normal oscillation modes and radial stability of neutron stars with a dark-energy core from the Chaplygin gas
• Impacts of symmetry energy slope on the oscillation frequencies of neutron stars with short-range correlation and admixed dark matter
• Effects of hadron-quark phase transition on properties of Neutron Stars
• Radial and Non-Radial Oscillations of Inverted Hybrid Stars
• Non-equilibrium effects on stability of hybrid stars with first-order phase transitions
• Quark-hadron pasta phase in neutron stars: the role of medium-dependent surface and curvature tensions
• Hybrid stars with color superconducting cores in an extended FCM model
• Hybrid stars with reactive interfaces: analysis within the Nambu-Jona-Lasinio model
• Gravitational wave asteroseismology limits from low density nuclear matter and perturbative QCD
• Radial oscillations in neutron stars from QCD
• PNJL model at zero temperature: three-flavor case
• Extra dimensions' influence on the equilibrium and radial stability of strange quark stars
• Stability and instability of strange dwarfs
• Non-radial oscillations and gravitational wave emission of hybrid neutron stars
• Exploring the axion potential and axion walls in dense quark matter
• Strange quark matter as dark matter: 40 years later, a reappraisal
• General relativistic surface degrees of freedom in perturbed hybrid stars
• Crustal failure as a tool to probe hybrid stars
• Impact of Multiple Phase Transitions in Dense QCD on Compact Stars
• Structure of Stellar Remnants with Coupling to a Light Scalar
• Strange Dwarfs: a review on the (in)stability
• Towards a unified hadron-quark equation of state for neutron stars within the relativistic mean-field model
• Effects of inner crusts on $g$-mode oscillations in neutron stars
• Dark energy effects on realistic neutron stars
• Fundamental-mode eigenfrequencies of neutral and charged twin neutron stars
• Phase transition and stiffer core fluid in neutron stars: Effects on stellar configurations, dynamical stability, and tidal deformability
• Confronting recent light compact star observations with color-flavor locked quark matter
• I-C-Q relations for rapidly rotating stable hybrid stars
• Love-C relations for elastic hybrid stars
• Matching slowly rotating spacetimes split by dynamic thin shells
• Exploring Radial Oscillations in Slow Stable and Hybrid Neutron Stars
• New modeling for hybrid stars with an elastic quark core
• Oscillatory properties of strange quark stars described by the vector MIT bag model
• Strange Matter
• Quark stars in $D_3$-$D_7$ holographic model
• Properties of the Object HESS J1731-347 as a Twin Compact Star
• Quark confinement in an equiparticle quark model: application to stellar matter
• Effective Field Theories for Neutron Stars Physics
• Feasibility of singularity avoidance for a collapsing object due to a scalar field
• Bayesian inference favors quark matter in neutron star interiors
• Can a hybrid star with constant sound speed parametrization explain the new NICER mass-radius measurements ?
• How Neutron Star Observations Point Towards Exotic Matter: Existing Explanations and a Prospective Proposal
• Electrically charged supermassive twin stars
• Effects of light-mass fermionic dark matter on the equilibrium and stability of white dwarfs
• X-ray pulsed light curves of highly compact neutron stars as probes of scalar-tensor theories of gravity
• Systematic study of the morphology and length of slow stable hybrid star branches
• Equation-of-State Independent Relations in Rapidly Rotating Hybrid Stars
• Modeling the Light Curve and Spectra of SN 2023aew
• Differentiating between sharp and smoother phase transitions in neutron stars
• Nonlinear electrodynamics in magnetars: systematic effects on radius constraints and timing analysis
• Rotating strange dwarfs and their indistinguishability from white dwarfs
• Compact dwarfs made of light-quark nuggets
• Classification of $g$-modes for neutron stars with a strong transition: Novel universal relation including slow stable hybrid stars