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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69df31eeac8e7
DTSTAMP:20260415T023630
DTSTART:20141104T134500
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20141104T144500
URL:https://murmitoyen.com/events/vanille/udem/detail/513767
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Late time cosmic acceleration
DESCRIPTION:Wali Hossain Center for Theoretical Physics\, Jamia Milia Islam
 ia University\, New Delhi\, India In 1998 Type Ia supernovae observations 
 first suggested that the recent Universe is accelerating. Further observat
 ions of Type Ia supernovae and also CMB\, BAO etc. confirm the presence of
  a third component of Universe other than matter and radiation. Theoretica
 lly It needs new physics or modifications of earlier theory to be explaine
 d. Though the cosmological constant is the simplest solution\, it has some
  theoretical problems. There are many alternative theories of gravity whic
 h can explain this late time acceleration. In this talk I will mainly disc
 uss about the observation and theory of late time cosmic acceleration. Fir
 st I will show how cosmological observations tell us about this kind of dy
 namics of the Universe and then talk about some theoretical models which c
 an explain this acceleration. Motivations to look for alternative theories
  of gravity will also be discussed.
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TZID:America/Montreal
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