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Colorful galaxy cluster in deep space with numerous stars, glowing clouds of purple and pink gas, and bright points of light scattered across a dark, star-filled background.

Particle Heating and Acceleration in Galaxy Clusters

Ellen Zweibel, University of Wisconsin-Madison

A swirling black hole surrounded by a bright, glowing accretion disk in deep space, with scattered stars and cosmic dust filling the dark background.

Electromagnetic and Gravitational Wave Signals from Merging Black Holes and Neutron Stars

Black hole-neutron star and neutron star-neutron star mergers are powerful emitters of gravitational waves, and can produce a wide range of bright electromagnetic transients. They also provide us with a remarkable environment to study nuclear interactions in the cold, dense core of neutron stars, and may significantly contribute to the production of many heavy elements whose origin remains unexplained.