Supernova clustering and galactic outflows

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• Matthew Smith (CfA Harvard)
• Friday 25 September 2020, 11:30-12:30
• via zoom .

If you have a question about this talk, please contact Martin Haehnelt.

Galactic outflows are commonly observed in a wide variety of systems. They form a fundamental component of contemporary theories of galaxy formation. This is particularly the case for low-mass galaxies, where star formation driven outflows are expected to be ubiquitous. They are frequently invoked to regulate stellar mass growth, reduce the overall baryon fraction, explain the mass-metallicity scaling relation, enrich the CGM /IGM with metals and possibly transform dark matter density profiles. However, the mechanisms that launch stellar driven galactic outflows are very much an open topic of research. In this talk, I will examine the sensitivity of galactic wind launching to the clustering properties of supernovae in space and time. In particular, I will show how the dispersal of star forming clouds by pre-supernova feedback can modulate the clustering of supernovae, their ability to form super-bubbles and hence generate galactic outflows. I will do this with the aid of a new state-of-the-art suite of high resolution simulations of dwarf galaxies that links feedback to individually resolved massive stars.

This talk is part of the Galaxies Discussion Group series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology, Astrophysics and General Relativity
• Galaxies Discussion Group
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• via zoom

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