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SUMMARY:Towards N-body Modelling of Self-Interacting Dark Matter Structure
 s with GIZMO
DTSTART;VALUE=DATE-TIME:20261030T093500Z
DTEND;VALUE=DATE-TIME:20261030T095000Z
DTSTAMP;VALUE=DATE-TIME:20261102T005518Z
UID:indico-contribution-6269@cern.ch
DESCRIPTION:Speakers: Dmitry Kalashnikov (NRNU MEPhI)\nThe standard cosmol
 ogical model $\\Lambda\\mathrm{CDM}$\, successfully describes large-scale 
 structure of the Universe. However\, several problems on galactic scales m
 otivate studies of alternative dark matter (DM) models. One of such models
  is self-interacting dark matter (SIDM)\, where interactions between DM pa
 rticles can change the internal structure of DM halos.\n \nIn previous stu
 dies\, our group considered SIDM models with a dark interaction as a possi
 ble explanation of the cosmic-ray positron excess. An important question f
 or such models is whether a two-component DM distribution can be formed dy
 namically\, where one component creates a separate spatial structure and c
 ontributes to the positron signal.\nIn this work\, we develop $N$-body sim
 ulation framework based on GIZMO to study this problem. At the current sta
 ge\, we compare collisionless CDM and SIDM halos and study the evolution o
 f their density profiles\, the formation of SIDM cores\, and the dependenc
 e of these effects on the interaction parameters. These simulations are al
 so used to test and validate the numerical setup.\nThe next step is to ext
 end the simulations to two-component DM models and study the conditions un
 der which the required spatial distributions can form and remain dynamical
 ly stable. This approach allows us to connect the microscopic properties o
 f SIDM models with the formation and evolution of DM structures relevant f
 or indirect DM searches.\n\nhttps://indico.particle.mephi.ru/event/626/con
 tributions/6269/
LOCATION: Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6269/
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