Equation of state constraints from nuclear physics, neutron star masses, and future moment of inertia measurements

Autor:	Greif, S. K., Hebeler, K., Lattimer, J. M., Pethick, C. J., Schwenk, A.
Rok vydání:	2020
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Solar and Stellar Astrophysics Nuclear Theory
Zdroj:	Astrophys. J. 901, 155 (2020)
Druh dokumentu:	Working Paper
DOI:	10.3847/1538-4357/abaf55
Popis:	We explore constraints on the equation of state (EOS) of neutron-rich matter based on microscopic calculations up to nuclear densities and observations of neutron stars. In a previous work we showed that predictions based on modern nuclear interactions derived within chiral effective field theory and the observation of two-solar-mass neutron stars result in a robust uncertainty range for neutron star radii and the EOS over a wide range of densities. In this work we extend this study, employing both the piecewise polytrope extension from Hebeler et al. as well as the speed of sound model of Greif et al., and show that moment of inertia measurements of neutron stars can significantly improve the constraints on the EOS and neutron star radii. Comment: 11 pages, 10 figures, published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2005.14164 Zobrazit plný text záznamu View this record from Arxiv