[Astro] [CAPT] CAPT Weekly Bulletin (w/c 16-06-25)

[Ella Batchelor]

Monday 16th June at 3pm, A113 CAPT – Theoretical Physics Student Seminar

Sam Close

An Introduction to Spinors and Clifford Algebras
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Tuesdays at 11am, CAPT Foyer – Astro Coffee



Tuesday 17th June at 11.30am, A113 CAPT – Astronomy Journal Club



Tuesday 17th  June at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar
Rachel Gray (Glasgow)

Using gravitational waves to solve the Hubble tension



Gravitational wave signals from compact binary mergers are of huge interest to the cosmology community due to their ability to act as standard sirens, providing measurements of luminosity distance which are independent of the cosmic distance ladder. This opens up new ways of measuring cosmological parameters, with particular focus on the Hubble constant, with the hopes of arbitrating the current Hubble tension. However, in order for this measurement to be made, additional redshift information is required. In the scenario where the merger is observed without a confirmed electromagnetic counterpart - true for all but one of the detections from the LIGO-Virgo-KAGRA collaboration to date - galaxy surveys, and the population of gravitational waves themselves, can be used to provide this missing information. I will introduce these latest methods and look at what the gravitational wave detections from the LIGO-Virgo-KAGRA collaboration can tell us so far, and how they might pave the way for solving the Hubble tension.


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 June at 3.45pm, C4 Physics – Astronomy Weekly Seminar

Elisabeth Sola (Cambridge)

Unveiling galaxy assembly with Low Surface Brightness tidal features


Hierarchical models of galaxy formation predict that galaxies grow through successive mergers, leaving behind tidal features—faint stellar structures that preserve a record of recent mass assembly. The properties of these features depend on the nature of the mergers that produced them, making them key tracers of galaxy evolution. However, their intrinsically low surface brightness (LSB) poses a major observational challenge, requiring tailored observing strategies and data processing techniques.
In this talk, I will present a quantitative study of tidal features around hundreds of nearby galaxies, based on deep imaging from both ground-based (CFHT) and space-based (Euclid) telescopes. Using a dedicated annotation tool, we systematically characterised these features in terms of their photometric and geometric properties. I will explore the connections between the host galaxies and their tidal features, and discuss the insights these structures offer into the late-stage assembly of galaxies. Finally, I will touch on how tidal features can be used to constrain the shapes of dark matter haloes.
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Thursday 19th June at 1pm, A113 CAPT – Astronomy Lunch Talk

Tom Bakx (Chalmers University of Technology – Sweden)


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



Thursday 19th June at 6pm, B1 Physics – Science Public Lecture

Jesse Golden-Marx

Intracluster light: using light to illuminate the dark universe



Join us this June as we explore the hidden architecture of the universe and the mysterious role of dark matter with Jesse Golden-Marx, Research Fellow in the Faculty of Science.


Roughly 85% of all matter in the universe is made up of unseen and mysterious dark matter.  Despite not being able to directly observe dark matter, galaxy clusters serve as a cosmic laboratory for astronomers to actively explore the nature of the dark universe.

In this talk, Jesse will discuss how astronomers use the most massive galaxies in the universe (100x bigger than the Milky Way) along with the faint “orphaned stars” that surround these massive galaxies to illuminate the properties of the unseen dark matter structures in the universe and inform the evolutionary roadmap that leads to the formation of these massive galaxies.


Whether you are interested in the mysteries of the cosmos or the cutting-edge techniques astronomers use to explore them, this lecture is for you.

This lecture is part of our monthly Science Public Lecture series, and everyone is welcome to join!



Registration URL: https://forms.office.com/e/2VH7ur2F88


For any questions about the public science lectures, please contact Hilary Collins<mailto:hilary.collins at nottingham.ac.uk>.
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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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