What form of matter resides in the cores of neutron stars? The central densities of known neutron stars whose masses range from one to two times that of our Sun far exceed the central densities of terrestrial atomic nuclei. At such extreme densities, the expectation is that quarks, the ...

Abundances in the third peak (180 < A < 200) of the r-process pattern produced with PRISM calculation of disk wind conditions of a neutron star merger event, before (blue line) and after spallation (red line) with initial ejecta velocity v=0.4c, compared to the solar r-process residuals shown in black points ...

Neutrinos can "talk" to each other much more than expected within the Standard Model, and this can provide an experimentally testable solution to the dark matter puzzle of the Universe. Can this lead to unidentified X-ray lines in galaxy clusters?

In environments where neutrinos are present in large number densities or fluxes — such as supernovae, compact object mergers, and the early universe — coherent neutrino-neutrino interactions can lead to interesting collective effects. We have explored corrections to standard “mean field” treatments of such phenomena, using a simple system to investigate ...