[Astro] [CAPT] Astro seminar Wed 12th Nov 15:45 C4 -- Sownak Bose (Durham)

[Luke Conaboy (staff)]

Hi all,

this week our seminar is given by Sownak Bose (Durham), details below. The seminar may be of interest to cosmologists, too!

Post-seminar refreshments will be wine and cheese.

Timings for this week:

* lunch at Portland, leaving CAPT ~13:00 (subsidised for a limited number of students -- let me know before the end of the day tomorrow)
* meet the speaker for postgrads at 15:00, finishing at 15:30
* seminar at 15:45 in C5/C4
* post-seminar wine and cheese at 17:00 in CAPT

This seminar will be conducted in person only.

Best,
Jesse, Tutku and Luke

==

Small-scale structure in cold dark matter: from ultra-faint dwarfs to prompt cusps 

In our present paradigm of galaxy formation, the onset of structure is brought about via the gravitational collapse of (cold) dark matter, which subsequently acts as the scaffolding for the visible universe. A vigorous programme of numerical simulations has established several features of the dark matter model: the formation of haloes, and how their structure and abundance is influenced by the particle physics of the underlying model. The smallest visible galaxies—so-called “ultra-faint dwarfs”—are fossil records of an early phase of galaxy formation in the Universe and their assembly provides strong clues into the Epoch of Reionisation, galactic feedback, and the nature of the dark matter particle. Yet, the cold dark matter model predicts the formation of structure many orders-of-magnitude below the scale where galaxy formation ends, where individual dark matter haloes have masses comparable to that of the Earth. In this talk, I will discuss some of the progress we have made in understanding this regime using numerical simulations, and what their implications are for understanding the physics of galaxy formation, the nature of dark matter, and our prospects for detecting dark matter in the future.
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