Can Gravitational Waves Reveal Phase Transitions in the Cores of Neutron Stars?

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 ...

Sandblasting the r-Process: Spallation of Ejecta from Neutron Star Mergers

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 Join Forces to Shed Light on Dark Matter

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?

Probing Quantum Entanglement in a Gas of Oscillating Neutrinos

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 ...

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The Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) is a multi-institutional collaboration dedicated to recruiting and training postdoctoral researchers interested in neutrino physics and astrophysics, nuclear astrophysics topics ranging from supernova and neutron star modeling to dark matter, and fundamental symmetries. The collaboration is funded by the National Science Foundation and the Heising-Simons Foundation.