NEUTRON STARS.

Abstract

The equation of state of dense matter is now reasonably well understood up to about nuclear-matter densities. At densities greater than that there are a number of uncertainties, and the effects of DELTA 's, possible other states such as pion condensation, solidification, abnormal states, and the properties of matter at ultrahigh densities remain interesting areas for future research. A number of properties of neutron star models are rather sensitive to the properties of matter at densities above that of nuclear matter, and therefore there exists the possiblity of obtaining information about the properties of such matter from observations of pulsars and compact X-ray sources.