Fluids & MHD Seminar

This week’s Fluids & MHD seminar will be given by Professor Samuel Falle (Leeds — https://eps.leeds.ac.uk/maths/staff/4020/professor-sam-falle) on Thursday from 15:00-16:00. The title of his talk is: Detonation Waves in Type Ia Supernovae. (Please see below for more details.) The talk will be hybrid (MALL + Zoom), and the link to join on Zoom is below.

Talk details:

Title: Detonation Waves in Type Ia Supernovae

Abstract: Type Ia supernova are known  to be thermonuclear explosions in a carbon-oxygen white dwarf that has acquired a helium envelope by accretion from a close companion star. The consensus model is that a flame starts at the centre of such a star and then becomes a detonation.  This only works if the star is close to its maximum possible mass, the Chandrakhar mass (~ 1.4 solar masses).

I will discuss an alternative model in which a detonation in the helium envelope triggers a detonation the carbon-oxygen core. Recent work has shown that such a model could explain all "normal" type Ia supernovae, but there are disparities in length scales that make direct numerical simulations extremely difficult.  The talk will consider some alternative techniques, such as front tracking using level set methods.

This has implications for Cosmology since Type Ia are used as distance indicators.

Zoom details:

Topic: Fluids & MHD Seminar — Samuel Falle

Time: Nov 28, 2024 03:00 PM London

Join Zoom Meeting

https://universityofleeds.zoom.us/j/85242946182?pwd=XFZ81gG4Zx3GCBI7JxPDSBQt4e09x4.1

Meeting ID: 852 4294 6182

Passcode: G0exQ?