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galaxyfactory [2016/12/05 10:04]
jr0018
galaxyfactory [2016/12/05 10:05] (current)
jr0018
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 ===== Published results =====  ===== Published results ===== 
  
-So far, we have focussed on understanding the tiniest star forming galaxies in the Universe - isolated 'dwarf irregular'​ galaxies. In a series of three papers, we have shown that bursty star formation in these dwarfs 'heats up' their dark matter, transforming their internal dark matter distribution. This solves a long-standing cosmological puzzle known as the '​cusp-core'​ problem. It also opens the door to using these dwarfs to directly probe the nature of dark matter. We have now used data for 18 such nearby systems to place a new constraint on the "​temperature"​ of dark matter, showing that dark matter most be quite "​cold"​ (i.e. non-relativistic) ​and therefore most likely ​massive ​particle that remains to be found.+So far, we have focussed on understanding the tiniest star forming galaxies in the Universe - isolated 'dwarf irregular'​ galaxies. In a series of three papers, we have shown that bursty star formation in these dwarfs 'heats up' their dark matter, transforming their internal dark matter distribution. This solves a long-standing cosmological puzzle known as the '​cusp-core'​ problem. It also opens the door to using these dwarfs to directly probe the nature of dark matter. We have now used data for 18 such nearby systems to place a new constraint on the "​temperature"​ of dark matter, showing that dark matter most be quite "​cold"​ (i.e. non-relativistic). This supports the idea that dark matter is new particle that lies beyond the standard model of particle physics.
  
 **Papers:** **Papers:**