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SUMMARY:Heating of a molecular cloud by a primordial black hole
DTSTART;VALUE=DATE-TIME:20241023T143600Z
DTEND;VALUE=DATE-TIME:20241023T144800Z
DTSTAMP;VALUE=DATE-TIME:20260306T212802Z
UID:indico-contribution-4097@cern.ch
DESCRIPTION:Speakers: Alexander Melikhov ()\nThe process of dust heating b
 y photons from primordial black hole (PBH) in a molecular cloud with masse
 s $M = 10^{16} - 10^{20}$ g has been considered. Under the assumption that
  dust particles are uniformly distributed in a spherically symmetric cloud
  and have sizes $a = 0.01\, 0.02\, 0.05$\, and $0.1$ $\\mu$m\, the dust te
 mperature as a function of the distance to the PBH was calculated. From th
 e plots obtained\, it follows that directly near the PBH the dust particle
 s are heated to a temperature $T \\leq 10^2$ K\, and with increasing dista
 nce the temperature drops sharply. Thus\, PBH can heat only a spherical la
 yer of the molecular cloud whose radius $r$ does not exceed $10^3$ cm. In 
 addition\, the emission spectra of dust particles heated by PBH were const
 ructed and it was shown how the spectra depend on the dust number density 
 in the molecular cloud and on the particle size. The sensitivity plots of 
 the planned Millimetron space observatory in the interferometer mode were 
 superimposed on the obtained spectra and it was shown that in the presence
  of PBH in the cloud\, it can be registered if the dust number density in 
 the cloud is between $n_d = 10^{-4}$ cm$^{-3}$ and $n_d = 10^{-1}$ cm$^{-3
 }$ (with the size of individual dust particles in the cloud varying from $
 0.1$ to $0.01$ $\\mu$m\, respectively).\n\nhttps://indico.particle.mephi.r
 u/event/436/contributions/4097/
LOCATION: Moskvorechye 2
URL:https://indico.particle.mephi.ru/event/436/contributions/4097/
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