Propagating fluctuations in 2-dimensions: a new numerical model for stochastic accretion disc simulations

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• Samuel Turner
• Wednesday 02 November 2022, 13:15-14:05
• The Hoyle Lecture Theatre + Zoom .

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Accretion occurs across a large range of scales and physical regimes. Despite this diversity in the physics, the observed properties show remarkably similarity. The theory of propagating fluctuations, first proposed by Lyubarskii (1997), has long been used to explain these phenomena. In this talk I will present the most detailed stochastic alpha-disc simulations based on this theory to date, including for the first time a 2-dimensional analogue of the 1-dimensional theory. I will show how this 2-dimensional work differs from the previous literature and show how the disc thickness and the timescale on which stochastic driving occurs are of fundamental important to what we observe. Finally, I will consider how this new stochastic model can be applied more widely within the field of accretion discs.

This talk is part of the Institute of Astronomy Seminars series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
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• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Seminars
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• The Hoyle Lecture Theatre + Zoom

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