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SUMMARY:An analytic model of a star cluster evolution in a galactic tidal 
 field - Pavel Ivanov - Lebedev Physical Institute
DTSTART:20210125T140000Z
DTEND:20210125T150000Z
UID:TALK153919@talks.cam.ac.uk
CONTACT:Cleo Loi
DESCRIPTION:Nuclear stellar clusters are common in the center of galaxies.
  We consider the possibility that their progenitors assumed to be globular
  clusters may have formed elsewhere\, migrated to\, and assembled near the
 ir present location. The main challenge for this scenario is whether globu
 lar clusters can withstand the tidal field of host galaxies. Our analysis 
 suggests that provided the mass-density distribution of galactic potential
  is shallow\, the tidal field near the center of galaxies is able to compr
 ess rather than disrupt a globular cluster at a distance from the center m
 uch smaller than the conventionally defined "tidal disruption radius". To 
 do so\, we consider the secular evolution of star clusters with a homogene
 ous mass-density distribution. We analytically solve the secular equations
  in the limit that the mass density of stars in the galactic center approa
 ches a uniform distribution. Our model indicates that a star cluster could
  travel to very small distances without disruption\, thus potentially cont
 ributing to the formation of the nuclear cluster. However\, appropriate nu
 merical N-body simulations are needed to confirm our analytic findings.
LOCATION:Online
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