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SUMMARY:Unveiling the nature of dark matter with small-scale cosmic struct
 ure - Risa Wechsler (Stanford/KIPAC)
DTSTART:20250619T150000Z
DTEND:20250619T160000Z
UID:TALK232663@talks.cam.ac.uk
CONTACT:Steven Brereton
DESCRIPTION:Cosmological and astrophysical observations provide clear evid
 ence for the existence of dark matter and have begun to map its distributi
 on across vast cosmic volumes\, yet key questions about its mass and inter
 action properties remain unanswered. Clues may lie in measurements that pr
 obe structure formation on the smallest scales—including dwarf galaxies\
 , strong gravitational lenses\, and stellar streams. These observations ar
 e already constraining aspects of the microphysical nature of dark matter\
 , including its free-streaming behavior\, decay lifetime\, self-interactio
 ns\, and possible interactions with the Standard Model. The upcoming gener
 ation of wide-field imaging surveys—including Euclid\, the Vera C. Rubin
  Observatory\, and the Roman Space Telescope—combined with spectroscopic
  surveys such as DESI and the new Via Project\, will accelerate our abilit
 y to probe this physics. These efforts may detect\, for the first time\, d
 ark matter halos below the threshold for star formation\, directly testing
  a fundamental prediction of the standard cosmological model and offering 
 the possibility of uncovering definitive astrophysical signatures of dark 
 matter’s particle properties.
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy (and online - deta
 ils to be sent by e-mail)
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