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UID:48@gravity.physik.fau.de
DTSTART;TZID=Europe/Berlin:20230503T133000
DTEND;TZID=Europe/Berlin:20230503T143000
DTSTAMP:20230422T082457Z
URL:https://www.gravity.physik.fau.de/events/talk-laura-herold-mpa-garchin
 g/
SUMMARY:Early Dark Energy: a status update and new constraint using the pro
 file likelihood (Laura Herold\, MPA Garching)
DESCRIPTION:Early dark energy (EDE) is a dark energy-like component in the 
 early universe\, which was proposed to solve the Hubble tension\, a discre
 pancy between different measurements of the current expansion rate of the 
 universe. Currently\, there is no consensus in the literature as to whethe
 r EDE can simultaneously solve the Hubble tension and provide an adequate 
 fit to the data from the cosmic microwave background and the large-scale s
 tructure of the universe. In this talk\, I will give a brief overview on t
 he status of EDE and describe the disagreement about EDE in the literature
 . To explore the origin of this disagreement\, we use a profile likelihood
  analysis and find evidence that the constraints on EDE from Markov Chain 
 Monte Carlo analyses are influenced by prior volume effects. Using the pro
 file likelihood we construct constraints on the Hubble constant and the fr
 action of EDE\, which are free from these effects\, and find that EDE pres
 ents a viable solution to the Hubble tension while presenting a good fit t
 o cosmological data sets.
CATEGORIES:Group Seminar
LOCATION:ECAP Lab Building ground floor 00.061\, Nikolaus-Fiebiger-Str. 2\,
  Erlangen \, 91058\, Germany
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Nikolaus-Fiebiger-Str. 2\, 
 Erlangen \, 91058\, Germany;X-APPLE-RADIUS=100;X-TITLE=ECAP Lab Building g
 round floor 00.061:geo:0,0
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TZID:Europe/Berlin
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DTSTART:20230326T030000
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