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SUMMARY:Ripples in the Dark: Wave Physics and the Cosmic Web
DTSTART:20251023T121500Z
DTEND:20251023T134500Z
DTSTAMP:20261009T133800Z
UID:indico-event-289@indico.physik.uni-bielefeld.de
DESCRIPTION:Speakers: Aoibhinn Gallagher (Maynooth University)\n\nIn this 
 talk I will present a coherent narrative from the foundations of cosmic st
 ructure formation to new insights arising from wave-based descriptions of 
 dark matter\, culminating in the main results of my recent work (here). I 
 will begin by outlining the standard ΛCDM picture of how small primordial
  density fluctuations grow under gravity into the sheets\, filaments\, and
  haloes of the cosmic web\, and how simple approaches such as the Zel’do
 vich approximation capture aspects of this nonlinear evolution. I will the
 n introduce wavelike (or ultra-light scalar) dark matter\, highlighting it
 s theoretical basis\, its distinctive scale-dependent behaviour due to a m
 acroscopic de Broglie wavelength\, and the advantages of the Schrödinger
 –Poisson formalism as an alternative to traditional fluid or N-body meth
 ods. Building on this framework\, I will discuss how classical fluid analo
 gies\, such as pressure\, viscosity\, and Reynolds numbers\, can be meanin
 gfully applied to such wave systems\, drawing on results from our recent s
 tudy (mentioned above). I will show when these analogies hold\, where the
 y fail\, and what they reveal about the physics of wavelike dark matter an
 d the growth of cosmic structure\, before concluding with prospects for fu
 ture analytical and numerical developments.\n\nhttps://indico.physik.uni-b
 ielefeld.de/event/289/
LOCATION:D6-135 (UHG)
URL:https://indico.physik.uni-bielefeld.de/event/289/
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