[Astronomy seminar] Thesis Seminar - May 25th Aurore Betranhandy

[Astronomy seminar announcements]

Reminder of Aurore's seminar in 20 min

C

On 23/05/2022 16:03, Chris Usher wrote:
>
> On *Wednesday* May 25th at 10:30 in FC 61 and on Zoom Aurore 
> Betranhandy (Stockholm) will be giving a seminar on her thesis work. 
> Please note the unusual day due to the klämdag on Friday.
>
> *Neutrino interactions and axion emission impact on core-collapse 
> supernova simulations*
>
> Core-Collapse Supernovae (CCSNe) are important phenomena in the scope 
> of nucleosynthesis and, as the final stage of massive stars’ life, 
> they are key processes in the understanding of stellar evolution. They 
> also are the birthplace of neutron stars and black holes, therefore 
> they play a major role in the modelling and understanding of compact 
> object mergers. While CCSNe have been observed for a long time, it is 
> mainly through electromagnetic radiation. This channel gives us 
> precious information about the explosion energy and nucleosynthesis, 
> but fails to inform us about the collapse and initial explosion 
> mechanism. While other observational channels are becoming available, 
> through neutrino detection and gravitational waves, we are still 
> waiting for a galactic CCSN to get an appropriate signal giving us 
> insight on the explosion mechanism. We, therefore, have to rely on 
> simulations for now. CCSN simulations have been performed for 60 
> years, improving decade after decade, and are now able to produce 
> systematic self-consistent explosions. Several parameters impact the 
> final outcome of our simulations, originating from different physics 
> treatments, such as the gravity, neutrino transport and interactions, 
> micro-physics through the equation of state, or magnetic fields. To 
> understand the explosion mechanism behind a CCSN, we need to study the 
> impact of each of these uncertain pieces of physics. In this thesis, I 
> focused on the impact of the emission of heavy-lepton neutrinos and 
> axions on the explosion, concentrated on the early proto-neutron star 
> cooling. I explain details of the CCSN process, as well as some of the 
> particle physics I focused on. I show how a change in heavy-lepton 
> neutrino and axion emissions can accelerate the early proto-neutron 
> star cooling and subsequently help the explosion.
>
> The schedule of upcoming seminars can be found here: 
> https://ttt.astro.su.se/ical/astro-seminars.ics
>
> Thanks
> Chris and Carolina
>
> Christopher Usher is inviting you to a scheduled Zoom meeting.
>
> Topic: Seminar - Aurore Betranhandy
> Time: May 25, 2022 10:30 AM Stockholm
>
> Join Zoom Meeting
> https://stockholmuniversity.zoom.us/j/66204962080
>
> Meeting ID: 662 0496 2080
>
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