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Pycnonuclear reactions and the nature of supranuclear matter

We discuss pycnonuclear burning in a strongly nonideal plasma of atomic nuclei at densities up to 1013 g cm−3. As an application, we consider pycnonuclear burning of matter accreted on a neutron star in a binary system. The energy released in this burning, while the matter sinks into the stellar crust under the weight of newly accreted material, is sufficient to warm the star. Its surface thermal radiation becomes dependent of poorly known equation of state of supranuclear matter in the stellar core, which gives a method to explore this equation of state. The results of such studies are outlined. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)