Is SAX J1808.4-3658 a Strange Star ?

Abstract

One of the most important questions in the study of compact objects is the nature of pulsars, including whether they are composed of $\beta$-stable nuclear matter or strange quark matter. Observations of the newly discovered millisecond X-ray pulsar \sax with the Rossi X-Ray Timing Explorer place firm constraint on the radius of the compact star. Comparing the mass - radius relation of \sax with the theoretical mass - radius relation for neutron stars and for strange stars, we find that a strange star model is more consistent with SAX J1808.4-3658, and suggest that it is a likely strange star candidate.

5 pages, Latex, 1 figure, corrected for some typos

Cited by in corpus (135)

• Strange Quark Matter and Compact Stars
• Millisecond Oscillations in X-Ray Binaries
• Crystalline Color Superconductivity
• Strange star equation of state fits the refined mass measurement of 12 pulsars and predicts their radii
• On the Nature of the X-ray Emission from the Accreting Millisecond Pulsar SAX J1808.4-3658
• Quark phases in neutron stars and a "third family" of compact stars as a signature for phase transitions
• A class of relativistic stars with a linear equation of state
• Electric fields at the quark surface of strange stars in the color-flavor locked phase
• Is RX J185635-375 a Quark Star?
• Quark deconfinement and implications for the radius and the limiting mass of compact stars
• Gamma Ray Bursts from delayed collapse of neutron stars to quark matter stars
• Anisotropic Compact stars in the Buchdahl model: A comprehensive study
• Possible Formation of Compact Stars in $f(R,T)$ Gravity
• Generalized model for anisotropic compact stars
• Conversion of neutron stars to strange stars as the central engine of gamma-ray bursts
• Anisotropic Compact Stars in $f(G)$ Gravity
• Thermodynamics, strange quark matter, and strange stars
• Color-Superconducting Gap in the Presence of a Magnetic Field
• Quark-Nova
• Effects of color superconductivity on the structure and formation of compact stars
• Internal X-ray plateau in short GRBs: Signature of supramassive fast-rotating quark stars?
• Testing Deconfinement at High Isospin Density
• Analytical models for quark stars
• High-density QCD pairing in compact star structure
• Quark stars within relativistic models
• Quark matter nucleation in neutron stars and astrophysical implications
• A new model for spherically symmetric charged compact stars of embedding class one
• Color Superconductivity in Compact Stars
• Constraining values of bag constant for strange star candidates
• All spherically symmetric charged anisotropic solutions for compact star
• Measurement of neutron star parameters: a review of methods for low-mass X-ray binaries
• Anisotropic stars with non-static conformal symmetry
• Maximum mass of a cold compact star
• Quark Stars in 4D Einstein-Gauss-Bonnet gravity with an Interacting Quark Equation of State
• Disk-jet coupling in low-luminosity accreting neutron stars
• Limits on Mass and Radius for the ms-Period X-ray Pulsar SAX J1808.4-3658
• Emerging Anisotropic Compact Stars in $f(\mathcal{G},T)$ Gravity
• Anisotropic Strange Quintessence Stars in $f(R)$ Gravity
• 1E 1207.4-5209: a low-mass bare strange star?
• Complexity Factor For Anisotropic Source in Non-minimal Coupling Metric $f(R)$ Gravity
• Fast spinning strange stars: possible ways to constrain interacting quark matter parameters
• Analytic models of Anisotropic Strange Stars in $f(T)$ Gravity with Off-diagonal tetrad
• What if pulsars are born as strange stars?
• Computation of the structure of magnetized strange quark star
• On the role of pressure anisotropy for relativistic stars admitting conformal motion
• Tolman-Oppenheimer-Volkoff equations in non-local $f(R)$ gravity
• Temperature profiles of accretion discs around rapidly rotating strange stars in general relativity: a comparison with neutron stars
• From Quark Stars to Hybrid Stars
• Strange quark matter in a chiral SU(3) quark mean field model
• Quark deconfinement transition in neutron stars with the field correlator method
• Strangeness in Neutron Stars
• Anisotropic Quark Stars with an Interacting Quark Equation of State
• Quark Stars as inner engines for Gamma Ray Bursts?
• Nature and Nurture: a model for soft gamma-ray repeaters
• The Bursting Behavior of 4U 1728-34: Parameters of a Neutron Star and Geometry of a NS-disk system
• Asymmetric core combustion in neutron stars and a potential mechanism for gamma ray bursts
• The crust of rotating strange quark stars
• Metastable strange matter and compact quark stars
• Quark-diquark equation of state and compact star structure
• Tidal deformability of strange stars and the GW170817 event
• Relativistic Solution for a Class of Static Compact Charged Star in Pseudo Spheroidal Space-Time
• An observational review of accretion-driven millisecond X-ray pulsars
• Strange stars in $f(\mathcal{R})$ gravity Palatini formalism and gravitational wave echoes from them
• Strange Quark Star Model with Quadratic Equation of State
• Lower Limit on Radius as a Function of Mass for Neutron Stars
• Apparent radii of neutron stars and equation of state of dense matter
• Generalised isothermal models with strange equation of state
• Population clustering as a signal for deconfinement in accreting compact stars
• Study of Proto Strange Stars (PSS) in Temperature and Density Dependent Quark Mass Model
• The birth of strange stars and their dynamo-originated magnetic fields
• Calculation of the Structure Properties of a Strange Quark Star in the Presence of Strong Magnetic Field Using a Density Dependent Bag Constant
• Magnetized Quark and Strange Quark Matter in the Spherical Symmetric Space-Time Admitting Conformal Motion
• Study of Anisotropic Compact Stars in $f(\mathcal{R},\mathcal{T},{\mathcal{R}}_{\chi \xi }{\mathcal{T}}^{\chi \xi })$ Gravity
• On the minimum radius of strange stars with crust
• Anisotropic Durgapal-Fuloria Neutron Stars in $f(\mathcal{R},{\mathrm{T}}^2)$ Gravity
• Close-in Exoplanets as Candidates of Strange Quark Matter Objects
• Effects of QCD phase transition on gravitational radiation from two-dimensional collapse and bounce of massive stars
• Superbursts and long bursts as surface phenomenon of compact objects
• Unmasking neutron star interiors using cooling simulations
• Rapidly rotating strange stars for a new equation of state of strange quark matter
• Modelling of a compact anisotropic star as an anisotropic fluid sphere in $f(T)$ gravity
• Search for Strange Quark Matter Produced in Relativistic Heavy Ion Collisions
• Paramagnetism in color superconductivity and compact stars
• Slowly rotating proto strange stars in Quark mass density- and temperature- dependent model
• On the nature of bimodal initial velocity distribution of neutron stars
• An unusual precursor burst with oscillations from SAX J1808.4-3658
• Recycling strange stars to millisecond periods
• Influence of strong magnetic field on the structure properties of strange quark stars
• Density dependent strong coupling constant of QCD derived from compact star data
• Are Radio Pulsars Strange Stars ?
• An evolutionary channel towards the accreting millisecond pulsar SAX J1808.4-3658
• A model finding a new Richardson potential with different scales for confinement and asymptotic freedom, by fitting the properties of ${\D}^{++}$ and ${\Om}^{-}$
• Low-mass X-ray Binaries with Strange Quark Stars
• The neutron star in the Relativistic Mean-Field Theory
• Modelling spin-up episodes in accreting millisecond X-ray pulsars
• Stability and instability of strange dwarfs
• Have we observed the skin vibration of realistic strange stars (ReSS) ?
• Relativistic Models Of A Class Of Compact Objects
• Modeling the strangeness content of hadronic matter
• Cooling Properties of Cloudy Bag Strange Stars
• Constraints on kHz QPO models and stellar EOSs from SAX J1808.4-3658, Cyg X-2 and 4U 1820-30
• Stability of strange stars (SS) derived from a realistic equation of state
• Possible evidence of surface vibration of strange stars from stellar observations
• Does Sub-millisecond Pulsar XTE J1739-285 Contain a Low Magnetic Neutron Star or Quark Star ?
• KHz QPOs in LMXBs, relations between different frequencies and compactness of stars
• Strangeness in Neutron Stars
• Strange stars properties calculated in the framework of the Field Correlator Method
• Evidence for strange stars from joint observation of harmonic absorption bands and of redshift
• The quark strange star in the enlarged Nambu-Jona-Lasinio model
• Pulsars: Gigantic Nuclei
• Newtonian and general relativistic contribution of gravity to surface tension of strange stars
• Strange Pulsar Hypothesis
• Incompressibility of strange matter
• Limits to the Mass and the Radius of the Compact Star in SAX J1808.4--3658 and Their Implications
• Quark-Diquark Equations of State Models: The Role of Interactions
• RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars
• Solving relativistic hydrodynamic equation in presence of magnetic field for phase transition in a neutron star
• SGRs and AXPs - Magnetars or Young Quark Stars ?
• Quark stars in $D_3$-$D_7$ holographic model
• The micro-glitch in PSR B1821-24 : A case for a strange pulsar?
• The missing compact star of SN1987A: a solid quark star?
• Decoupling of pion coupling f_π from quarks at high density in three models, and its possible observational consequences
• Addendum to ``Decoupling of pion coupling $f_{\pi }$ from quarks at high density in three models, and its possible observational consequences"
• General relativistic hydrodynamic simulations of binary strange star mergers
• Structure and cooling of compact stars
• Analytical model on mass limit of strange stars
• Probing the symmetry energy at high baryon density with heavy ion collisions
• Strange stars: Can their crust reach the neutron drip density?
• Bound for entropy and viscosity ratio for strange quark matter
• Dynamical stability of strange quark stars
• Self lensing effects for compact stars and their mass-radius relation
• Do strange stars exist in the Universe?
• On the anomalous mass defect of strange stars in the Field Correlator Method
• Glimpses of a strange star
• Mixed Phase in Compact Starts : M-R relations and radial oscillations