GW170817 and the prospect of forming supramassive remnants in neutron star mergers

Abstract

The gravitational wave data of GW170817 favor the equation of state (EoS) models that predict compact neutron stars (NSs), consistent with the radius constraints from X-ray observations. Motivated by such a remarkable progress, we examine the fate of the remnants formed in NS mergers and focus on the roles of the angular momentum and the mass distribution of the binary NSs. In the mass shedding limit (for which the dimensionless angular momentum equals to the Keplerian value, i.e., $j=j_{\mathrm{Kep}}$), the adopted { seven EoS models, except H4 and ALF2,} yield supramassive NSs in more than half of the mergers. However, for $j\lesssim 0.7j_{\mathrm{Kep}}$, the presence or absence of a non-negligible fraction of supramassive NSs formed in the mergers depends sensitively on both the EoS and the mass distribution of the binary systems. The NS mergers with a total gravitational mass $\le 2.6M_{\odot }$ are found to be able to shed valuable light on both the EoS model and the angular momentum of the remnants if supramassive NSs are still absent. We have also discussed the uncertainty on estimating the maximum gravitational mass of non-rotating NSs ($M_{\max }$) due to the unknown $j$ of the pre-collapse remnants. With the data of GW170817 and the assumption of the mass loss of $0.03M_{\odot }$, we have $M_{\max }<(2.19,2.32)M_{\odot }$ (90\% confidence level) for $j=(1.0,0.8)j_{\mathrm{Kep}}$, respectively.

arXiv comment9 pages including 4 eps figures, moderate extension but main conclusions are unchanged, ApJ in press

References in corpus (69)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• A Massive Pulsar in a Compact Relativistic Binary
• The equation of state for nucleon matter and neutron star structure
• Neutron Star Structure and the Equation of State
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• Masses, Radii, and Equation of State of Neutron Stars
• A unified equation of state of dense matter and neutron star structure
• Transient Events from Neutron Star Mergers
• Equations of state for supernovae and compact stars
• Predictions for the Rates of Compact Binary Coalescences Observable by Ground-based Gravitational-wave Detectors
• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• The Nuclear Equation of State and Neutron Star Masses
• Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
• Using gravitational-wave observations and quasi-universal relations to constrain the maximum mass of neutron stars
• Hybrid stars that masquerade as neutron stars
• A short gamma-ray burst apparently asssociated with an elliptical galaxy at redshift z=0.225
• The Equation of State of Hot, Dense Matter and Neutron Stars
• Systematics of dynamical mass ejection, nucleosynthesis, and radioactively powered electromagnetic signals from neutron-star mergers
• Neutron-star radius constraints from GW170817 and future detections
• Binary neutron-star mergers: a review of Einstein's richest laboratory
• The mass ejection from the merger of binary neutron stars
• The afterglow of GRB050709 and the nature of the short-hard gamma-ray bursts
• Signatures of magnetar central engines in short GRB lightcurves
• Producing ultra-strong magnetic fields in neutron star mergers
• Kilonovae
• Short Duration Gamma-Ray Bursts with Extended Emission from Proto-Magnetar Spin-Down
• X-Ray Flares from Postmerger Millisecond Pulsars
• On the Mass Distribution and Birth Masses of Neutron Stars
• Maximum mass, moment of inertia and compactness of relativistic stars
• The Neutron Star Mass Distribution
• Optical and X-ray emission from stable millisecond magnetars formed from the merger of binary neutron stars
• Gravitational waves and neutrino emission from the merger of binary neutron stars
• Flares in long and short Gamma-Ray Bursts: a common origin in a hyperaccreting accretion disk
• Search for post-merger gravitational waves from the remnant of the binary neutron star merger GW170817
• Bright "merger-nova" from the remnant of a neutron star binary merger: A signature of a newly born, massive, millisecond magnetar
• Discovery of the short gamma-ray burst GRB 050709
• Formation of Stable Magnetars from Binary Neutron Star Mergers
• The Macronova in GRB 050709 and the GRB/macronova connection
• Early X-ray and optical afterglow of gravitational wave bursts from mergers of binary neutron stars
• Gravitational waves and mass ejecta from binary neutron star mergers: Effect of the mass-ratio
• A test of the millisecond magnetar central engine model of GRBs with Swift data
• Fallback accretion in the aftermath of a compact binary merger
• The X-ray afterglow flat segment in short GRB 051221A: Energy injection from a millisecond magnetar?
• Constraints on binary neutron star merger product from short GRB observations
• Modeling dynamical ejecta from binary neutron star mergers and implications for electromagnetic counterparts
• Merging Neutron Stars I: Initial Results for Coalescence of Non-Corotating Systems
• Nuclear Equation of State from Observations of Short Gamma-Ray Burst Remnants
• Asymmetric nuclear matter and neutron star properties
• Phase transitions and He-synthesis driven winds in neutrino cooled accretion disks: prospects for late flares in short gamma-ray bursts
• Observationally constraining gravitational wave emission from short gamma-ray burst remnants
• Short-living supermassive magnetar model for the early X-ray flares following short GRBs
• Bright broad-band afterglows of gravitational wave bursts from mergers of binary neutron stars
• Short GRBs: opening angles, local neutron star merger rate and off-axis events for GRB/GW association
• Neutron Star Mass-Radius Constraints of the Quiescent Low-mass X-ray Binaries X7 and X5 in the Globular Cluster 47 Tuc
• How loud are neutron star mergers?
• The Fate of Neutron Star Binary Mergers
• Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations
• Signature of gravitational radiation in afterglow of short Gamma-Ray Bursts?
• Effect of Differential Rotation on the Maximum Mass of Neutron Stars: Realistic Nuclear Equations of State
• Discovery of the afterglow and host galaxy of the low redshift short GRB 080905A
• The unpolarized macronova associated with the gravitational wave event GW170817
• Linearly polarized X-ray flares following short gamma-ray bursts
• A supra-massive magnetar central engine for short GRB 130603B
• The Fate of the Compact Remnant in Neutron Star Mergers
• Fast Rotation of Neutron Stars
• An Upper Bound on Neutron Star Masses from Models of Short Gamma-ray Bursts
• Magnetar central engine and possible gravitational wave emission of nearby short GRB 160821B
• A double neutron star merger origin for the cosmological relativistic fading source PTF11agg?
• Model-dependent estimate on the connection between fast radio bursts and ultra-high energy cosmic rays

Cited by in corpus (21)

• Gravitational waves from neutron star mergers and their relation to the nuclear equation of state
• A magnetar origin for the kilonova ejecta in GW170817
• The mass distribution of Galactic double neutron stars
• A long-lived remnant neutron star after GW170817 inferred from its associated kilonova
• Long-lived Remnants from Binary Neutron Star Mergers
• PSR J0030+0451, GW170817 and the nuclear data: joint constraints on equation of state and bulk properties of neutron stars
• Maximum gravitational mass $M_{\mathrm{TOV}}=2.25_{-0.07}^{+0.08}{M}_{\odot }$ inferred at about $3\%$ precision with multimessenger data of neutron stars
• Neutron star equation of state: QMF modeling and applications
• Neutron stars in $f(\mathtt{R},{\mathtt{L}}_{\mathtt{m}})$ gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from $NICER$ data
• Neutron stars in $f(\mathcal{R},\mathcal{T})$ gravity using realistic equations of state in the light of massive pulsars and GW170817
• Maximum mass cutoff in the neutron star mass distribution and the prospect of forming supramassive objects in the double neutron star mergers
• Estimating the maximum gravitational mass of nonrotating neutron stars from the GW170817/GRB 170817A/AT2017gfo observation
• GW170817: The energy extraction process of the off-axis relativistic outflow and the constraint on the equation of state of neutron stars
• The equation of state and some key parameters of neutron stars: constraints from GW170817, the nuclear data and the low mass X-ray binary data
• Galactic Double Neutron Star total masses and Gaussian mixture model selection
• Constraining the long-lived supramassive neutron stars by magnetar boosted kilonovae
• Needle in a Bayes Stack: a Hierarchical Bayesian Method for Constraining the Neutron Star Equation of State with an Ensemble of Binary Neutron Star Post-merger Remnants
• The Masses of Isolated Neutron Stars Inferred from the Gravitational Redshift Measurements
• A Deep Targeted Search for Fast Radio Bursts from the Sites of Low-Redshift Short Gamma-Ray Bursts
• Postmerger multimessenger analysis of binary neutron stars: Effect of the magnetic field strength and topology
• Total gravitational mass of the Galactic Double Neutron Star systems: evidence for a bimodal distribution