January 25, 2017
1:00PM - 2:00PM
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2017-01-25 14:00:00
2017-01-25 15:00:00
CCAPP Special Seminar/Cosmolunch: "Outskirts of Dark Matter halos" Susmita Adhikari (U of Illinois Urbana-Champaign)
Recent work has shown that density profiles in the outskirts of dark matter halos can become extremely steep over a narrow range of radius, deviating from well-known fitting functions like the Navarro-Frenk-White(NFW) profile. This behavior is produced by splashback material on its first apocentric passage after accretion. The location of this splashback feature may be understood quite simply, from first principles. I will discuss how this feature may be used as a probe of fundamental physical phenomena like dynamical friction and also of exotic physics. I will also review the progress in the detection of this feature in observations of galaxy clusters.
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OSU ASC Drupal 8
ascwebservices@osu.edu
America/New_York
public
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Add to Calendar
2017-01-25 13:00:00
2017-01-25 14:00:00
CCAPP Special Seminar/Cosmolunch: "Outskirts of Dark Matter halos" Susmita Adhikari (U of Illinois Urbana-Champaign)
Recent work has shown that density profiles in the outskirts of dark matter halos can become extremely steep over a narrow range of radius, deviating from well-known fitting functions like the Navarro-Frenk-White(NFW) profile. This behavior is produced by splashback material on its first apocentric passage after accretion. The location of this splashback feature may be understood quite simply, from first principles. I will discuss how this feature may be used as a probe of fundamental physical phenomena like dynamical friction and also of exotic physics. I will also review the progress in the detection of this feature in observations of galaxy clusters.
PRB Price Place
Center for Cosmology and AstroParticle Physics (CCAPP)
ccapp@osu.edu
America/New_York
public
Recent work has shown that density profiles in the outskirts of dark matter halos can become extremely steep over a narrow range of radius, deviating from well-known fitting functions like the Navarro-Frenk-White(NFW) profile. This behavior is produced by splashback material on its first apocentric passage after accretion. The location of this splashback feature may be understood quite simply, from first principles. I will discuss how this feature may be used as a probe of fundamental physical phenomena like dynamical friction and also of exotic physics. I will also review the progress in the detection of this feature in observations of galaxy clusters.
