Optimal Neutron-star Mass Ranges to Constrain the Equation of State of Nuclear Matter with Electromagnetic and Gravitational-wave Observations
- Creators
- Weih, L. R.
- Most, E. R.
- Rezzolla, L.
Abstract
Exploiting a very large library of physically plausible equations of state (EOSs) containing more than 107 members and yielding more than 109 stellar models, we conduct a survey of the impact that a neutron-star radius measurement via electromagnetic observations can have on the EOS of nuclear matter. Such measurements are soon to be expected from the ongoing Neutron Star Interior Composition Explorer mission and will complement the constraints on the EOS from gravitational-wave detections. Thanks to the large statistical range of our EOS library, we can obtain a first quantitative estimate of the commonly made assumption that the high-density part of the EOS is best constrained when measuring the radius of the most massive, albeit rare, neutron stars with masses M ≳ 2.1 M_⊙. At the same time, we find that radius measurements of neutron stars with masses M ≃ 1.7–1.85 M_⊙ can provide the strongest constraints on the low-density part of the EOS. Finally, we quantify how radius measurements by future missions can further improve our understanding of the EOS of matter at nuclear densities.
Additional Information
© 2019. The American Astronomical Society. It is a pleasure to thank Cole Miller, Cecilia Chirenti, and Anna Watts for useful discussions. Support comes also in part from HGS-HIRe for FAIR; the LOEWE-Program in HIC for FAIR; "PHAROS," COST Action CA16214 European Union's Horizon 2020 Research and Innovation Programme (grant 671698) (call FETHPC-1-2014, project ExaHyPE); the ERC Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" (grant No. 610058). The calculations were performed on the GOETHE cluster at CSC in Frankfurt.Attached Files
Published - Weih_2019_ApJ_881_73.pdf
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Additional details
- Eprint ID
- 121232
- Resolver ID
- CaltechAUTHORS:20230501-297531000.55
- Helmholtz Graduate School for Hadron and Ion Research
- Helmholtz International Center for FAIR
- CA16214
- European Cooperation in Science and Technology (COST)
- 671698
- European Research Council (ERC)
- 610058
- European Research Council (ERC)
- Created
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2023-05-04Created from EPrint's datestamp field
- Updated
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2023-05-04Created from EPrint's last_modified field