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Science 22 November 2002:
Vol. 298. no. 5598, p. 1511
DOI: 10.1126/science.298.5598.1511c

This Week in Science

Nucleon-nucleon interactions make it difficult to compress ordinary matter here on Earth beyond an approximate saturation density of about 2.7 x 1014 grams per cubic centimeter. However, this limit is exceeded by objects in space such as neutron stars (densities about nine times the saturation density) and supernovae (densities about four times the saturation density). Danielewicz et al. (p. 1592) have developed a new theoretical equation-of-state model, which relates densities to pressure and temperature conditions, for supersaturated matter based on recent high-density nuclear collision experiments. They limit the range of possible pressure and temperature conditions that may exist in neutron stars and supernovae, which not only constrains the concentrations of neutrons versus protons in these objects but also their dynamical behavior.





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Science. ISSN 0036-8075 (print), 1095-9203 (online)