[Astro] [CAPT] CAPT Weekly Bulletin (w/c 24-11-25)

[Ella Batchelor (staff)]

Monday 24th November at 3pm, A113 CAPT – Theoretical Physics Student Seminar

Peter Du

From classical mechanics to higher spin theory



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Tuesdays at 11am, CAPT Foyer – Astro Coffee



Tuesday 25th November at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar

Fraser Cowie (Oxford)

How smooth is the radio sky?


The radio synchrotron background (RSB) is a measurement of the total emission from the sky at radio wavelengths. Carefully calibrated measurements over the past decade have revealed that the level of this background is significantly higher than expected from known astrophysical sources such as diffuse galactic emission and discrete extragalactic point sources. Many exciting models, both astrophysical and those invoking beyond standard model physics, can explain an excess background but more measurements are needed to discern between different possibilities. We present the largest low-frequency image of the RSB to date taken with the LOFAR telescope and we use this exquisite dataset to measure the anisotropy of the radio sky at low frequencies. Combined with full pipeline simulations of some empirical models we can constrain what properties models must have to reproduce our observations of the radio sky.

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 26th November at 11am, A113 CAPT – CAPT Coding Club



Wednesday 26th November at 3pm, B13 Physics – School Colloquium

Dr Anton Souslov (Cambridge)

Active Solids

Active solids consume energy to allow for actuation and shape change not possible in equilibrium. I will introduce non-reciprocal active solids as a novel class of active matter based on constituents that interact without action-reaction symmetry, leading to unusual elastic and mechanical properties. In the first part of this talk, I will explore the anomalous relation between microscopic structure and emergent elasticity in these materials, which we dub "more is less": as microscopic activity increases, macroscale active response can vanish. In the second part, I will talk about instabilities in these materials, leading to the formation and coarsening of dynamical patterns. Finally, I will discuss the surprising functionality of these systems, for example locomotion. These results unveil unusual facets of active matter, offering new principles for engineering materials far from equilibrium.

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Thursday 27th November at 1pm, A113 CAPT – Astronomy Lunch Talk
Joe Butler



Thursday 27th November 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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