[Astro] [CAPT] CAPT Weekly Bulletin (w/c 17-03-25)

[Ella Batchelor]

Monday 17th March at 3pm, A113 Physics – Theoretical Physics Student Seminar

Drande Patogu

O(d,d) Invariant Cosmology.

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Tuesdays at 11am, CAPT Foyer – Astro Coffee



Tuesday 18th March at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar
Ivano Basile (Max-Planck Institut für Astrophysik)

Scale separation with strings attached



Empirical evidence famously indicates that we live in a universe with four extended spacetime dimensions and no "fifth forces" at low energies. Building realistic universes from string theory runs into several challenges, among which achieving both of these conditions simultaneously. This is known as the scale separation problem. I will present a novel approach to this end, concocting four-dimensional string vacua directly from the worldsheet formulation by analogy with the Banks-Zaks phenomenon in gauge theory. The resulting vacua are non-supersymmetric anti-de Sitter spacetimes with no intermediate effective description in higher dimensions. I will provide a working example in four dimensions as a proof of principle.


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 19th March at 3.45pm, C4 Physics – Astronomy Seminar
Jenny Carter (Leicester)

SMILE! The first simultaneous images of the magnetopause and aurora


The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is a joint European Space Agency, Chinese Academy of Sciences mission due for launch in 2024 to explore coupling between the solar wind and Earth’s magnetosphere. SMILE will simultaneously monitor the movement of the magnetopause boundary and the subsequent response of the Northern Hemisphere ionosphere using two imaging cameras with offset field of views. The magnetopause is known to respond to changes in the incoming solar wind and interplanetary field, but this will be the first time that real-time images of this movement will be tracked. The high-latitude ionosphere is connected to near-Earth space via terrestrial magnetic field lines. Phenomena in the ionosphere, such as patches of aurora and precipitating particle signatures may be provoked as a direct result of processes at the dayside magnetopause. Alternatively, nightside or magnetotail processes lead to the large-scale phenomena such as a substorm. In this talk we will explore how SMILE will contribute to resolving the large outstanding questions regarding the Earth’s magnetosphere. We will examine the efforts of the global solar-terrestrial community to use multiple and varied experimental data, for example from radar, ground magnetometers, and all-sky auroral imagers in unravelling these questions at large, medium, and small temporal and spatial scales.


Wednesday 19th March at 6pm, Djanogly Recital Hall – Cosmic Titans Evening Talk: Black Holes
Join Professor Ruth Gregory, Kings College London and artist Conrad Shawcross RA for this evening talk.

Every black hole sings its own song in the darkness. Our esteemed speakers will explore the science and art of these elusive giants. Learn how we can observe their collisions in distant parts of the universe.

Click here<https://www.lakesidearts.org.uk/event/black-holes/> to book.
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Thursday 20th March at 1pm, A113 CAPT – Astronomy Lunch Talk

Harley Brown

Origins of Intracluster Light (in Simulations)



Despite noteworthy differences between the simulation codes used (and a number of significant differences between the predictions of the two simulations), the result that roughly Milky-Way mass galaxies are the most significant contributors of ICL stars to halo mass ~ 1014 Msun galaxy clusters at z=0 appears broadly consistent between the two simulations. However, the two simulations do differ in regards to the predicted significance of secondary ICL formation channels - namely, extra-galactic star-formation in clusters ("in-situ" ICL).



Thursday 20th March at 3pm, A113 CAPT – Particle Cosmology Journal Club

General Journal Club

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Fridays at 4pm, CAPT Foyer – CAPT Cakes
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VISITORS
Anthony Gonzalez (University of Florida) will be visiting the Astronomy group until Weds 19th March.

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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