High Energy Theory Seminar
21 January 2011
Niayesh Afshordi (Perimeter
Institute)
Largest and smallest dark matter
clusters, and what we can learn from them
Abstract:
A ubiquitous feature of cold dark matter paradigm is emergence of dark
matter clusters (or haloes) on a large range of scales. Observational
studies of these clusters can teach us a wealth of information, ranging
from cosmology to particle physics. I first talk about largest of these
clusters, and how they can teach us about cosmology. In particular, I
will discuss how well linear growth of density perturbations can be
tied to cluster number counts. I will then turn to dark matter
clustering on small scales, and introduce a novel analytic framework to
predict its properties. This leads to interesting signatures in dark
matter direct and indirect detection experiments, and even pulsar
timing observations.
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