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SUMMARY:New bounds on axion-like particles from NuSTAR observations
DTSTART;VALUE=DATE-TIME:20191223T161000Z
DTEND;VALUE=DATE-TIME:20191223T161500Z
DTSTAMP;VALUE=DATE-TIME:20261006T084126Z
UID:indico-contribution-126@indico.bitp.kiev.ua
DESCRIPTION:Speakers: Denys Savchenko (Bogolyubov Institute for Theoretica
 l Physics of the National Academy of Sciences of Ukraine\, Kyiv)\nAxions a
 re hypothetical particles beyond the Standard Model. Their existence is po
 stulated to resolve the strong CP problem in QCD. The existence of the axi
 on-like particles should modify the visible spectra of the cosmic objects 
 due to their coupling to photons in the presence of a magnetic field\, for
  example\, inside galaxy clusters. For this reason\, they were proposed as
  one of the explanations for the inconsistencies between Hitomi and Chandr
 a observations of the 3.5 keV line in Perseus cluster. Furthermore\, axion
 -like particles could constitute the cold dark matter itself.\nIn this tal
 k\, we present the upper bounds on the axion-photon coupling from non-dete
 ction of imprints of such coupling in the NuSTAR observations of the NGC12
 75 galaxy\, embedded in the Perseus galaxy cluster.\n\nhttps://indico.bitp
 .kiev.ua/event/4/contributions/126/
LOCATION:Bogolyubov Institute for Theoretical Physics of the National Acad
 emy of Sciences of Ukraine 322
URL:https://indico.bitp.kiev.ua/event/4/contributions/126/
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