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SUMMARY:Lorenzo Annulli (CENTRA\, Instituto Superior Tecnico)
DTSTART:20200709T133000Z
DTEND:20200709T143000Z
DTSTAMP:20260423T035745Z
UID:CENTRA/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CENTRA/6/">S
 tirred and shaken: dynamical behavior of boson stars and dark matter cores
 </a>\nby Lorenzo Annulli (CENTRA\, Instituto Superior Tecnico) as part of 
 CENTRA Seminar\n\n\nAbstract\nThe nature and properties of dark matter are
  arguably among the most important open issues in science. Interesting can
 didates for dark matter include light bosonic \nfields. Such scalar fields
  can give rise to confined structures\, as boson stars or Q-balls. Boson s
 tars are interesting hypothetical new "dark matter stars"\, but also good 
 descriptions of dark matter haloes when the fields are ultralight. In this
  talk\, I'm going to focus on the the dynamical response of Newtonian boso
 nic structures when excited by external matter (stars\, planets or black h
 oles) in their vicinities. The study of the dynamics of such bodies is imp
 ortant for a number of reasons\, ranging from stability to the way they in
 teract with surrounding objects (stars\, planets or black holes etc.). Amo
 ng others issues\, I am going to describe the local changes in the density
  of a dark matter halo triggered by the presence of a massive black hole o
 r a star\, the drag exerted by the bosonic clump on stars moving within it
 \, the flux of energy and momentum induced by coalescing binaries\, etc. I
  will provide a complete picture of the interaction between black holes or
  stars and the ultralight dark matter environment they live in.\n
LOCATION:https://researchseminars.org/talk/CENTRA/6/
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