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SUMMARY:J-factor estimation of Draco\, Sculptor and Ursa Minor dSphs with 
 the member/foreground mixture model
DTSTART;VALUE=DATE-TIME:20191112T030900Z
DTEND;VALUE=DATE-TIME:20191112T031000Z
DTSTAMP;VALUE=DATE-TIME:20250110T182851Z
UID:indico-contribution-1559@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Shunichi Horigome (Kavli IPMU)\nDwarf spheroidal gal
 axies (dSphs) are promising targets for indirect detection experiments sin
 ce they contain a large amount of dark matter (DM). For the precise calcul
 ation of the amount of annihilation signal flux from dSph\, we must know t
 he DM mass density distribution of target dSphs\, estimated from the obser
 vation of the stellar motion.\nIn the DM profile estimation\, the major un
 certainty of DM profile comes from the foreground contamination of the Mil
 ky Way stars in front of dSph. In the conventional analyses\, the contamin
 ated stars are partially removed based on their membership probability est
 imated by a clustering technique called EM algorithm. However\, even if we
  use this technique\, some contaminated stars still remain in the data set
 \, which leads to the incorrect sensitivity of indirect detection experime
 nts.\nIn this work\, we adopt a new method to deal with the contamination 
 effect based on the mixture model of the dSph member and foreground stars.
 \nUsing this method\, we estimate the DM density profile of Draco\, Sculpt
 or\, and Ursa Minor\, the top three DM rich dSphs\, with reliable errorbar
 s properly including the uncertainty of the contamination effect.\n\nhttps
 ://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1559/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1559/
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