Figure (IMAGE) Simons Foundation Caption The simulated density distribution of electron-positron plasma near the surface of a neutron star (shown in gray at the bottom of the plot). Redder regions represent a higher density of electron-positron pairs. Credit A. Philippov et al./Physical Review Letters 2020 Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.