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<div>Dear Everyone,<br>
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<div>Next week's seminar will be given by <span>Liubov Kovalenko.</span><br>
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Thursday the 19th at 13:15 in A5:1003.<br>
Zoom: <a href="https://stockholmuniversity.zoom.us/j/3575421837" class="OWAAutoLink" id="LPlnk28826">
https://stockholmuniversity.zoom.us/j/3575421837</a></div>
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<div>Best,<br>
Haakon (on behalf of the organisers)<br>
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Speaker: Liubov Kovalenko<br>
Title: Rotation and Magnetic Fields in Extreme Core-Collapse Supernovae<br>
Abstract:<br>
Core-collapse supernovae are shaped by the interplay of gravity, neutrinos, rotation,
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and magnetic fields in the first seconds after collapse. While most simulations focus on neutrino-driven hydrodynamics, magnetic fields are
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likely essential for understanding the most rapidly rotating and extreme explosions, as well as their connection to magnetar formation.
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In this talk, I will present 3D simulations of an extremely compact 39-solar-mass progenitor and compare three models:
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a non-rotating baseline case, a rotating case without magnetic fields, and a rotating magnetized case. Although the collapse and bounce
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are broadly similar, the post-bounce evolution differs significantly. Rotation and magnetic fields alter the shock evolution, outflow morphology,
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proto-neutron-star dynamics, and the angular structure of the neutrino emission. These differences are especially important for multimessenger signals.
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Because the newly formed core is initially opaque to photons (and even neutrinos), gravitational waves may provide the<br>
earliest direct observational window into the proto-neutron star just after bounce. Using these models,
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I will discuss how rotation and magnetic fields influence both the explosion dynamics and the<br>
gravitational-wave signatures that may provide access to the innermost post-bounce evolution.</div>
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