BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Dynamics of the cusp-to-core transformation in the cold dark matte
 r halos
DTSTART;VALUE=DATE-TIME:20191112T031800Z
DTEND;VALUE=DATE-TIME:20191112T031900Z
DTSTAMP;VALUE=DATE-TIME:20250110T182853Z
UID:indico-contribution-1569@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Kazuki Kato (University of Tsukuba)\nThe lambda cold
  dark matter model is the standard paradigm of structure formation in the 
 universe. However\, there is a discrepancy known as the “cusp–core pro
 blem” in the mass–density distribution of a dark matter halo (DMH) bet
 ween theory and observation. We investigate the dynamical response of DMHs
  to recurrent starbursts on the formation of less massive galaxies to solv
 e this issue. In the early epoch of the galaxy formation\, the cycle of ex
 pansion and contraction of the interstellar gas driven by the stellar feed
 backs leads to a recursive change in the gravitational potential of the ga
 s. The eccentricity of the DMH particles around the centre becomes large b
 y this change. Then\, the system expands\, and the core scale increases du
 e to the oscillation process. Finally\, the DMH then reaches the new quasi
 -equilibrium state. Our simulation shows that the energy transport by the 
 overtone components contained in the periodic oscillation of the potential
  change strongly influences the inner slope of the mass–density profile 
 of the DMH. We conclude that the resonance between DMH particles and the d
 ensity wave excited by the oscillating potential plays a crucial role in u
 nderstanding the physical mechanism of the cusp–to–core transition of 
 DMHs.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1569/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1569/
END:VEVENT
END:VCALENDAR