Cosmic chocolate pralines? General neutron star structure revealed goetheuni AAS_Office
inside neutron stars, as they can hardly be recreated on Earth in the laboratory. There are therefore many models in which various properties—from density and temperature—are described with the help of so-called equations of state. These equations attempt to describe the structure of neutron stars from the stellar surface to theNow, physicists at Goethe University Frankfurt have succeeded in adding further crucial pieces to the puzzle. The working group, led by Prof.
"This result is very interesting because it gives us a direct measure of how compressible the center of neutron stars can be," says Prof. Luciano Rezzolla,"Neutron stars apparently behave a bit like chocolate pralines: Light stars resemble those chocolates that have a hazelnut in their center surrounded by soft chocolate, whereas heavy stars can be considered more like those chocolates where a hard layer contains a soft filling.
By modeling the equations of state, the physicists were also able to uncover other previously unexplained properties ofstars. For example, regardless of their mass, they very probably have a radius of only 12 km. Thus, they are just as large in diameter as Goethe University's hometown of Frankfurt. Study author Dr. Christian Ecker explains,"Our extensive numerical study not only allows us to make predictions for the radii and maximum masses of
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