Jesse Miller Defense - "Consequences of Near-Earth Supernovae on the Heliosphere"

Event Type

Other

Sponsor

Department of Astronomy

Location

Atlas Room, Astronomy Building

Virtual

Date

Jul 5, 2022   10:00 am  

Views

27

Originating Calendar

Astronomy Department Events Calendar

Our solar system has been within ~100 pc of supernovae twice within the past 10 million years. Evidence for this claim comes primarily from 60Fe found in geological samples showing supernovae at 3 and 7 million years ago. The forward shock of the supernova remnant propagated through the ISM, eventually reaching the solar system. There, the blast greatly compressed the heliosphere, the region swept out by the solar wind.

In this thesis defense, I will present simulations modelling the interaction between a supernova blast and the heliosphere. Even for very close supernovae, the blast does not reach the orbit of Earth. However, much of the outer solar system was directly exposed to the supernova blast. As the remnant evolves, the heliosphere rebounds across the solar system. Most of these simulations take advantage of axisymmetry with a steady solar wind, though I will also show effects of a 3D time-varying solar wind.

 

Topic: Jesse Miller's Thesis Defense

Time: Jul 5, 2022 10:00 AM Central Time (US and Canada)

 

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