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SUMMARY:Small-scale structure in cold dark matter: from ultra-faint dwarfs
  to prompt cusps  - Sownak Bose Durham University
DTSTART:20241128T160000Z
DTEND:20241128T170000Z
UID:TALK225079@talks.cam.ac.uk
CONTACT:Jan Scholtz
DESCRIPTION:In our present paradigm of galaxy formation\, the onset of str
 ucture is brought about via the gravitational collapse of (cold) dark matt
 er\, which subsequently acts as the scaffolding for the visible universe. 
 A vigorous programme of numerical simulations has established several feat
 ures of the dark matter model: the formation of haloes\, and how their str
 ucture and abundance is influenced by the particle physics of the underlyi
 ng model. The smallest visible galaxies—so-called “ultra-faint dwarfs
 ”—are fossil records of an early phase of galaxy formation in the Univ
 erse and their assembly provides strong clues into the Epoch of Reionisati
 on\, galactic feedback\, and the nature of the dark matter particle. Yet\,
  the cold dark matter model predicts the formation of structure many order
 s-of-magnitude below the scale where galaxy formation ends\, where individ
 ual dark matter haloes have masses comparable to that of the Earth. In thi
 s 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 ma
 tter\, and our prospects for detecting dark matter in the future. 
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy
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