Neutron Star Radii, Core-collapse Supernovae, and the Equation of State of Dense Matter
نویسندگان
چکیده
Neutron star mass and radius measurements are becoming sufficiently accurate as to offer astrophysical constraints on the properties of neutron-rich matter near the nuclear saturation density. Current observations, which imply that the radius of a 1.4 solar mass neutron star lies between 10.4 and 12.9 km (95% confidence), also imply that 43 < L < 67 MeV, where L is a parameter describing the slope of the nuclear symmetry energy and that the neutron skin thickness in lead is relatively small.
منابع مشابه
0 Nuclear Matter and its Role in Supernovae , Neutron Stars and Compact Object Binary Mergers 1
The equation of state (EOS) of dense matter plays an important role in the supernova phenomenon, the structure of neutron stars, and in the mergers of compact objects (neutron stars and black holes). During the collapse phase of a supernova, the EOS at subnuclear densities controls the collapse rate, the amount of deleptonization and thus the size of the collapsing core and the bounce density. ...
متن کاملTensor Correlations and Pions in Dense Nuclear Matter
Despite concerted efforts by many groups over a period of more than three decades, the problem of stellar collapse, supernova production, and neutron star formation is still not understood. The basic physical inputs required for calculations of stellar collapse are, apart from an initial stellar model, the equation of state of hot dense matter, and the rates of neutrino production, absorption, ...
متن کاملSome aspects of the phase diagram of nuclear matter relevant to compact stars
Dense matter as it can be found in core-collapse supernovae and neutron stars is expected to exhibit different phase transitions which impact the matter composition and the equation of state, with important consequences on the dynamics of core-collapse supernova explosion and on the structure of neutron stars. In this paper we will address the specific phenomenology of two of such transitions, ...
متن کاملShort neutrino burst from failed supernovae as a probe of dense matter with hyperon mixture
We study the gravitational collapse of non-rotating massive stars (40–50M ̄) and the associated neutrino burst by general relativistic ν-radiation hydrodynamics. We show that the neutrino burst from the accreting proto-neutron star till the black hole formation is short and energetic in a situation of failed explosion. This unique characteristics is a hallmark of black hole formation and disting...
متن کاملSpin and Isospin Asymmetry, Equation of State and Neutron Stars
In the present work, we have obtained the equation of state for neutron star matter considering the in uence of the ferromagnetic and antiferromagnetic spin state. We have also investigated the structure of neutron stars. According to our results, the spin asymmetry stiens the equation of state and leads to high mass for the neutron star.
متن کامل