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SUMMARY:A paradigm shift in cosmology? - Carlos Frenk (Durham)
DTSTART:20260306T143000Z
DTEND:20260306T153000Z
UID:TALK238057@talks.cam.ac.uk
CONTACT:Steven Brereton
DESCRIPTION:The ``Lambda cold dark matter'' (LCDM) cosmological model (whe
 re\nLambda stands for Einstein's cosmological constant and CDM for cold\nd
 ark matter) is one of the great achievements in Physics of the past\nforty
  years. Theoretical predictions formulated in the 1980s turned\nout to agr
 ee remarkably well with measurements\, performed decades\nlater\, of the g
 alaxy distribution and the temperature structure of the\ncosmic microwave 
 background radiation.  Yet\, these successes do not\ninform us directly ab
 out the nature of the dark matter or the dark\nenergy which are the two co
 rnerstones of the model. In recent years a\nnumber of observations have su
 ggested possible discrepancies with LCDM\nboth on large and small scales. 
 On large scales results from the DESI\ngalaxy survey seem inconsistent wit
 h Lambda and suggest instead an\nevolving dark energy. On small scales\, t
 he abundance of satellite\ngalaxies in the Milky Way and the discovery of 
 bright galaxies at very\nearly times by the James Webb Space telescope are
  often interpreted as\nchallenges to the standard model.\n
LOCATION:Hoyle Lecture Theatre\, Institute of Astronomy (In-person/Streame
 d)
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