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UID:69daac040e25b
DTSTAMP:20260411T161604
DTSTART:20180301T103000
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URL:https://murmitoyen.com/events/vanille/udem/detail/810348-probing-the-pa
 rticle-nature-of-dark-matter-with-strong-gravitational-lensing-yashar-heza
 veh-stanford
LOCATION:Université de Montréal - Pavillon Claire-McNicoll\, 2900\, chemi
 n de la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Probing the particle nature of dark matter with strong gravitationa
 l lensing - Yashar Hezaveh (Stanford)
DESCRIPTION:The nature of dark matter is one of the most important outstand
 ing questions in modern cosmology and astrophysics. Uncovering the propert
 ies of the dark matter particle could result in significant leaps in our u
 nderstanding of fundamental physics and impact numerous astrophysical mode
 ls. It is well understood that the microphysics of the dark matter particl
 e impacts its clustering properties on different scales. The most widely a
 ccepted dark matter model\, cold dark matter\, has had tremendous success 
 explaining the large-scale structure of the universe. However\, it has fac
 ed many challenges for its predictions of the distribution of matter on sm
 all\, sub-galactic scales\, with some observations seemingly favoring a wa
 rm dark matter alternative. A definitive answer to this question can only 
 be achieved by mapping the distribution of dark matter on small scales wit
 h a purely gravitational probe. Strong gravitational lensing is the only p
 robe capable of doing this at cosmological distances. In this talk\, I wil
 l discuss how the discovery of a new population of strong gravitational le
 nses\, a new observatory\, ALMA\, and new advances in analysis methods are
  allowing us to map the distribution of dark matter on small scales with h
 igh precision. In the coming years\, thousands of new lenses from large su
 rveys (e.g.\, LSST)\, existing and new facilities (e.g.\, ALMA\, JWST\, TM
 T)\, and new analysis methods will transform this field\, allowing us to u
 nderstand the small-scale behavior of dark matter with unprecedented accur
 acy and precision\, opening a new window for testing dark matter models in
  a previously inaccessible regime.
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