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SUMMARY:Moduli Stars - Francesco Muia\, DAMTP
DTSTART:20201102T130000Z
DTEND:20201102T140000Z
UID:TALK152731@talks.cam.ac.uk
CONTACT:David Stefanyszyn
DESCRIPTION:The recent direct detection of gravitational waves (GWs) has o
 pened a new window of observation for physical phenomena in which gravity 
 is the dominant interaction. Collisions of black holes and neutron stars h
 ave been observed and a plethora of new events\, even involving new physic
 s\, are expected to be detected in the next few years. It is natural to ex
 plore alternative physical objects that may exist which are different from
  the standard stars and black holes and that could lead to particular impr
 ints on the GW spectrum. In this talk I will explore the possibility that 
 moduli (gravitationally coupled scalar fields arising in all string compac
 tifications) can compose star-like objects (moduli stars) whose dynamics g
 ives rise to GW production. I will illustrate their formation in the early
  universe\, that has been studied through lattice techniques. After their 
 formation moduli stars can have different behaviours\, e.g. they could rap
 idly collapse to black holes or disperse into scalar radiation\, resulting
  in different phenomenology. I will describe the fate of moduli stars\, th
 at has been investigated through numerical relativity techniques.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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