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SUMMARY:Revisiting clusters of PBHs as dark matter candidates
DTSTART;VALUE=DATE-TIME:20261027T145000Z
DTEND;VALUE=DATE-TIME:20261027T145500Z
DTSTAMP;VALUE=DATE-TIME:20261101T090738Z
UID:indico-contribution-6405@cern.ch
DESCRIPTION:Speakers: Максим Краснов (National Research Nucle
 ar University MEPhI)\nIn this paper we revisit Primordial Black Holes (PBH
 s) clusters as Dark Matter (DM) candidates. Here we present continuation o
 f our previous work\, extending the analysis. The analysis is devoted to r
 e-consideration of constraint on PBH abundance from stellar cluster observ
 ation in dwarf galaxy Eridanus II. We take into account non-trivial densit
 y profile of PBH clusters in order to re-estimate the energy exchange betw
 een PBHs and stars. Here we keep momentum approximation to strengthen the 
 constraint making it robust. The impact of density profile concludes in th
 e form of Coulomb logarithm\, making analysis trivial\, but showing import
 ant result. It is shown that density profile matters and energy exchange c
 an be suppressed due to it considerably\, making clusters of PBHs viable\n
 DM candidates\, if their core radius is sufficiently large.\n\nhttps://ind
 ico.particle.mephi.ru/event/626/contributions/6405/
LOCATION:Sevastopol hotel Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6405/
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