Astrophysical measurement of the equation of state of neutron star matter
Feryal ÖzelDepartment of Astronomy and Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, Arizona 85721, USAGordon BaymDepartment of Physics, University of Illinois, 1110 W. Green Street, Urbana, Illinois 61801, USATolga GüverDepartment of Astronomy and Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, Arizona 85721, USA
2010en
ABI
Аннотация
We present the first astrophysical measurement of the pressure of cold matter above nuclear saturation density, based on recently determined masses and radii of three neutron stars. The pressure at higher densities is below the predictions of equations of state that account only for nucleonic degrees of freedom, and thus present a challenge to the microscopic theory of neutron star matter.
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