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VERSION:2.0
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SUMMARY:Collapsed structures in scalar-tensor theories of gravity
DTSTART:20230419T160000Z
DTEND:20230419T180000Z
DTSTAMP:20260730T125337Z
UID:9636918f-e32e-4ad6-89f0-3f6d162f8b82
SEQUENCE:1
CREATED:20230418T090336Z
DESCRIPTION: Abstract:Dark energy represents perhaps the most relevant pro
 blem in cosmology. Light scalar fields coupled to matter could explain the
  accelerated expansion of the universe. This implies going beyond Lambda-C
 DM and the SM\, yet there is no observation of such fifth forces in our so
 lar system. This discrepancy can be resolved by a screening mechanism. Fro
 m the plethora of theories\, we are interested in studying the chameleon f
 ield. The presence of this fifth interaction during the radiation-dominate
 d era of the universe would change the structure formation history\, allev
 iating some of the current cosmological tensions. Moreover\, the coupling 
 of this field to compact objects\, such as neutron stars or white dwarves\
 , affects their structure\, stability\, and dynamics\, providing us with s
 ome hints about its detectability. 
LAST-MODIFIED:20230418T090336Z
LOCATION:Sala de Formação Avançada do DF (Sala 2-8.11 - 2º Piso do Pav
 ilhão de Física)
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/collapsed-structures-in-sc
 alar-tensor-theories-of-gravity/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="9s9s0"><b> Abstract:</b><b
 r/>Dark energy represents perhaps the most relevant problem in cosmology. 
 Light scalar fields coupled to matter could explain the accelerated expans
 ion of the universe. This implies going beyond Lambda-CDM and the SM\, yet
  there is no observation of such fifth forces in our solar system. This di
 screpancy can be resolved by a screening mechanism. <br/><br/>From the ple
 thora of theories\, we are interested in studying the chameleon field. The
  presence of this fifth interaction during the radiation-dominated era of 
 the universe would change the structure formation history\, alleviating so
 me of the current cosmological tensions. <br/><br/>Moreover\, the coupling
  of this field to compact objects\, such as neutron stars or white dwarves
 \, affects their structure\, stability\, and dynamics\, providing us with 
 some hints about its detectability. </p>
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