[Astro] [CAPT] CAPT Weekly Bulletin (w/c: 03/03/25)

[Ella Batchelor]

Monday 3rd March at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar
Tuomas Tenkanen (Helsinki)

What's still hot in Electroweak phase transitions? A perspective from three spatial dimensions over the past decade.



Motivated by their prospects to produce potentially observable primordial gravitational wave background, as well as to provide a viable mechanism for baryogenesis, understanding the physics of Electroweak phase transitions has been a hot topic for a long time.



In this talk, I will present developments from the past decade that have culminated in: i) automating the required dimensionally reduced, thermal effective field theory (EFT) descriptions; ii) gaining an intuitive understanding of the underlying 'supersoft' mass scale above the non-perturbative scale of confinement for scalar field-driven phase transitions; iii) including thermal loop corrections up to and including three loops; and iv) building effective perturbative descriptions for bubble nucleation and sphaleron rates in the thermal plasma. Finally, I will envision future directions for studying Beyond the Standard Model theories at high temperatures, and high-loop-order perturbative calculations beyond simple EFTs built upon high-temperature expansions.


Link to join:  https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d



Monday 3rd March at 3pm, A113 CAPT – Theoretical Physics Student Seminar
Benjamin Muntz

On Frame Covariance and Field Space Geometry

---

Tuesdays at 11am, CAPT Foyer – Astro Coffee
---

Wednesday 5th March at 3.45pm, C4 Physics – Astronomy Seminar
Dr Jon Davies (Liverpool John Moores)

The origins of galaxy diversity in cosmological simulations



In the latest generation of cosmological simulations, the properties of Milky Way-like galaxies are shaped by how they interact with the gas reservoirs in their host haloes - the circumgalactic medium (CGM). In my talk I will explore how the galaxies in these simulations transform the content and properties of their CGM through feedback, and in turn, how the properties of the CGM determine the future evolution of galaxies. In particular, I will focus on how the fates of Milky Way-like galaxies are set by the growth histories of their central supermassive black holes (SMBHs); the growth of an over-massive SMBH causes the majority of the CGM to be expelled by AGN feedback, preventing the “refuelling” of the galaxy and leading to quenching, whilst the growth of an under-massive SMBH allows star formation to continue. These differences in SMBH growth therefore play a crucial role in establishing the diversity of galaxy properties in haloes of similar mass in these simulations, and so I will devote the rest of my talk to exploring why these differences exist. I will present the results of several controlled galaxy formation experiments, performed with the EAGLE model using carefully modified initial conditions, that have given us new insight into how SMBH growth is shaped by the assembly history of the host galaxy and halo, and revealed the essential role that galaxy mergers play in producing the star formation bimodality in cosmological simulations.
---

Thursday 6th March at 1pm, A113 CAPT – Astronomy Lunch Talk

James Bolton

Exploring the high redshift intergalactic medium in the ELT era



I’ll talk about the ELT (first light in 2028) and highlight some of the IGM / reionisation era science that will be possible with it.



Thursday 6th March at 3pm, A113 CAPT – Particle Cosmology Journal Club
---
Fridays at 4pm, CAPT Foyer – CAPT Cakes
---
If you have any events/visitors you would like included in next week’s bulletin, please let me know.


Best wishes

Ella

Ella Batchelor (she/her)
Administrator

School of Physics & Astronomy

University of Nottingham
A112a Centre for Astronomy & Particle Theory
University Park
Nottingham, NG7 2RD

+44 (0) 115 74 86778 |  nottingham.ac.uk<http://nottingham.ac.uk/>

[cid:image001.png at 01DB8C14.39CAD3F0]

Follow us
facebook.com/uniofnottingham<http://facebook.com/TheUniofNottingham>
twitter.com/uniofnottingham<http://twitter.com/UniofNottingham>
youtube.com/nottmuniversity<http://youtube.com/nottmuniversity>
instagram.com/uniofnottingham<http://instagram.com/uniofnottingham>
linkedin.com/company/university-of-nottingham<http://linkedin.com/company/university-of-nottingham>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nottingham.ac.uk/pipermail/astro/attachments/20250303/68ddf818/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 190221 bytes
Desc: image001.png
URL: <http://lists.nottingham.ac.uk/pipermail/astro/attachments/20250303/68ddf818/attachment-0001.png>
-------------- next part --------------
_______________________________________________
CAPT mailing list
CAPT at lists.nottingham.ac.uk
https://lists.nottingham.ac.uk/mailman/listinfo/capt