Using Gravitational-wave Observations and Quasi-universal Relations to Constrain the Maximum Mass of Neutron Stars

By Luciano Rezzolla, E. Most, L. R. Weih. 2017

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Combining the GW observations of merging systems of binary neutron stars and quasi-universal relations, we set constraints on the maximum mass that can be attained by nonrotating stellar models of neutron stars. More specifically, exploiting the recent observation of the GW event GW170817 and drawing from basic arguments on kilonova modeling of GRB 170817A together with the quasi-universal relation between the maximum mass of nonrotating stellar models and the maximum mass supported through uniform rotation , we set limits for the maximum mass to be , where the lower limit in this range comes from pulsar observations. Our estimate, which follows a very simple line of arguments and does not rely on the modeling of the electromagnetic signal in terms of numerical simulations, can be further refined as new detections become available. We briefly discuss the impact that our conclusions have on the equation of state of nuclear matter.

Subfields: Astronomy and Astrophysics, Oceanography

View Paper: https://www.semanticscholar.org/paper/452c7bd653fc1512ee267e17d00d996e7cc0647f

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Citations in the corpus

Origin of the heaviest elements: The rapid neutron-capture process (2019, background): “17 M (Margalit and Metzger, 2017; Shibata et al., 2017; Rezzolla et al., 2018; Ruiz et al., 2018) following the observation of GW170817.”
Towards understanding astrophysical effects of nuclear symmetry energy (2019, neutral): “2.0 2.1 2.2 2.3 2.4 2.5 2.6 Baym et al. (2019) Shibata et al. (2019) Zhou et al. (2018) with pairing Zhou et al. (2018) Zhang & Li (2018) Shibata et al. (2018) Ruiz et al. (2018) Rezzolla et al. (2018) Margalit et al. (2017) Mmax [Msun] Fig.”
On the Sound Speed in Neutron Stars (2022, background): “…et al. 2013; Cromartie et al. 2019; Fonseca et al. 2021) and theoretical predictions on the maximum (gravitational) mass (Margalit & Metzger 2017; Rezzolla et al. 2018; Ruiz et al. 2018; Shibata et al. 2019; Nathanail et al. 2021) suggest stiff EOSs with c 1 3s 2 at densities n0, again…”
Critical examination of constraints on the equation of state of dense matter obtained from GW170817 (2018, neutral): “5 1.8 2.0 2.2 2.4 2.6 2.8 3.0 Mmax [Msol] 100 200 300 400 500 600 700 Λ̃ ntr = 0.32fm −3 q = 1 q = 0.7 Margalit et al. (2017) Rezzolla et al. (2018) Shibata et al. (2017) Radice et al. (2018) FIG.”
A Magnetar Origin for the Kilonova Ejecta in GW170817 (2018, background): “…(as was likely the case for GW170817; e.g., Bauswein et al. 2017; Granot et al. 2017; Ma et al. 2017; Margalit & Metzger 2017; Perego et al. 2017; Rezzolla et al. 2017; Ruiz et al. 2018), then the formation of a torus generically results from the outward transport of angular momentum, which…”
Binary Neutron Star Mergers: Mass Ejection, Electromagnetic Counterparts, and Nucleosynthesis (2018, background): “…Fattoyev et al. 2018; Hinderer et al. 2018; Malik et al. 2018; Most et al. 2018b; Nandi et al. 2018; Paschalidis et al. 2018; Radice et al. 2018c; Rezzolla et al. 2018; Ruiz et al. 2018; Tews et al. 2018; Tsang et al. 2018; Wei et al. 2018), and the origin of short γ-ray bursts (SGRBs; Abbott et…”
Combined Constraints on the Equation of State of Dense Neutron-rich Matter from Terrestrial Nuclear Experiments and Observations of Neutron Stars (2018, methodology): “…using observations of GW170817 combined with theories/simulations and the causality limit under some caveats have placed the upper bounds on neutron star masses in the range of (2.16− 2.28)M⊙ (Margalit & Metzger 2017; Shibata et al. 2017; Rezzolla et al. 2018; Ruiz et al. 2018), see, e.g., ref.”
Tidal Deformability from GW170817 as a Direct Probe of the Neutron Star Radius (2018, background): “In another work, Rezzolla et al. (2017) inferred the maximum neutron star mass from the event without relying on models of the electromagnetic signal, instead using only the quasi-universal relations that describe neutron stars and simple models of kilonovae.”