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SUMMARY:Gamma-ray emission from the recently discovered dwarf galaxy Retic
 ulum II
DTSTART;VALUE=DATE-TIME:20151027T083800Z
DTEND;VALUE=DATE-TIME:20151027T085500Z
DTSTAMP;VALUE=DATE-TIME:20260412T061825Z
UID:indico-contribution-870@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Savvas Koushiappas (Brown University)\nI will presen
 t results on the analysis of gamma-ray emission from the recently discover
 ed dwarf galaxy Reticulum II. Using Fermi-LAT data and a suite of  backgro
 und models  we quantify the probability that the observed gamma-ray emissi
 on is due to background.  Taking into account trials factors\, we find emi
 ssion p-values in the range between 9.8x10^-5 and 9.7x10^-3 and conclude t
 hat Reticulum II has the most significant gamma-ray emission from any othe
 r known dwarf galaxy. I will also discuss the dark matter content of Retic
 ulum II as derived from kinematic studies of its member stellar population
  and show that Reticulum II has a dark matter halo similar to other nearby
  dwarf galaxies. If the gamma ray emission is due to dark matter annihilat
 ion\, the annihilation cross section is consistent with the s-wave relic a
 bundance cross section. I will conclude by discussing further tests that a
 re needed in order to ascertain the likelihood of this emission to be due 
 to a conventional astrophysical interpretation.\n\nhttps://indico.icrr.u-t
 okyo.ac.jp/event/23/contributions/870/
LOCATION: Room 2
URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/870/
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