[Astro] [CAPT] CAPT Weekly Bulletin (w/c 16-03-26)

[Ella Batchelor (staff)]

Monday 16th March at 1.30pm, A113 CAPT – Theoretical Physics Student Seminar

Benjamin Muntz

An introduction to CFTs - Part 2

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Tuesdays at 11am, CAPT Foyer – Astro Coffee

Tuesdays at 11.30am, A113 CAPT – Astronomy Journal Club



Tuesday 17th March at 1pm, C12 Physics – Particle Cosmology and Gravity Seminar

Miguel Montero (IFT, Madrid)
Quantum gravity on Riemann-flat Manifolds


In recent work with B. Bento, we have been able to realize top-down string theory compactifications on Riemann-flat manifolds, where supersymmetry is broken at the KK scale and where one can find dS maxima with large radius and small vacuum energy in Planck units. These solutions are fully explicit and are under extraordinary (but not complete) control. I will review the construction of RFM's, explicit formulate to compute Casimir energies, describe explicit examples, no-go theorems, and potential connections of solutions like these to cosmology.



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
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Wednesday 18th March at 3.45pm, C4 Physics – Astronomy Seminar
Lucy Oswald (Southampton)

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Thursday 19th March at 1pm, A113 CAPT – Astronomy Lunch Talk

Fiona Sawyer

Uncovering the IGM temperature during reionisation with machine learning


The thermal state of the IGM at high redshifts has the potential to serve as a useful probe of reionisation, providing information to help constrain, for example, the main drivers of reionisation through the thermal proximity effect around quasars.  While previous approaches have relied on summary statistics to measure IGM temperature, new machine learning methods will offer the opportunity to measure the underlying physical properties of the IGM (including its temperature) at a much higher resolution.
In this talk, I will discuss my work on making a neural network to predict the temperature of the IGM during reionisation, within quasar proximity zones. We find a good recovery of the underlying physical parameters within errors, including when realistic noise is added. I will also consider the challenges of moving from predicting on simulated data to observations and how well the network responds to them, paving the way for new temperature measurements during reionisation.



Thursday 19th March at 3pm, A113 CAPT – Particle Cosmology Journal Club

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Fridays at 4pm, CAPT Foyer – CAPT Cakes
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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/>

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