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Fall 2015
Interactions between stars are crucial for diverse areas of astrophysics, but they are not yet fully understood. These interactions come in forms as diverse as a direct physical collision, matter transfer from one star to another, and a "common envelope" (CE). The CE phase is a...
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Fall 2015
Interactions between stars are crucial for diverse areas of astrophysics, but they are not yet fully understood. These interactions come in forms as diverse as a direct physical collision, matter transfer from one star to another, and a "common envelope" (CE). The CE phase is a short period of...
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Fall 2024
We investigate mass ejection from accretion disks formed during the collapse of rapidly-rotating Wolf-Rayet stars, also known as collapsars. The neutrino-cooled, black hole (BH) accretion disk that forms at the center of the star — and the ensuing outflows – provides the conditions for these...
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Fall 2020
We investigate the production of fast ejecta from the contact interface in coalescing binary neutron stars. This ejecta expands rapidly enough (velocities > 0.6c) that the r-process freezes out, generating an ultraviolet precursor to the kilonova powered by the decay of free neutrons. Previous...