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DTSTAMP:20260904T234319Z
SUMMARY:Particle Cosmology Seminar – Djuna Croon
DESCRIPTION:Dark archaeology: hunting for substructure and constraining co
 smology\nMany dark matter models predict small-scale substructure\, includ
 ing subhalos\, boson stars\, miniclusters\, and primordial black holes. In
  this talk\, I will discuss how gravitational microlensing serves as a pow
 erful probe of these scenarios. I will describe the characteristic observa
 tional signals\, and highlight how certain mass distributions—such as th
 ose associated with boson stars and some subhalos —produce distinctive f
 eatures due to optical effects like caustics. I will explore opportunities
  for detecting these microlensing signatures using machine learning techni
 ques\, including real-time anomaly detection on time-series data from futu
 re surveys. Finally\, I will discuss caustic crossings in giant arcs as a 
 novel probe of subhalos\, which can be used to derive constraints on the e
 arly Universe power spectrum
URL:https://www.imperial.ac.uk/events/198932/particle-cosmology-seminar-22/
DTSTART;TZID=Europe/London:20251010T120000
DTEND;TZID=Europe/London:20251010T130000
LOCATION:H503\, Huxley Building\, South Kensington Campus\, Imperial Colleg
 e London\, London\, SW7 2AZ\, United Kingdom
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