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DTSTART;TZID=Europe/Paris:20211021T110000
DTEND;TZID=Europe/Paris:20211021T120000
DTSTAMP:20260411T062939
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7847-1634814000-1634817600@www.lapth.cnrs.fr
SUMMARY:Warm dark matter constraints using indirect searches
DESCRIPTION:Warm dark matter (WDM) could explain some small-scale structure observations that have challenged the cold dark matter (CDM) model\, as warm particles suppress structure formation due to free streaming effects. Observing small-scale structure thus provides a valuable way to distinguish between CDM and WDM. In this talk\, I will present a semi-analytical model for the dark matter substructure evolution. Satellite galaxies form within dark matter subhaloes\, and I will discuss constraints on WDM models based on the observed number of satellites in the Milky Way. Moreover\, warm particles such as sterile neutrinos and axion-like particles can decay into photons\, which are consequently detectable by X-ray telescopes. eROSITA will perform an all-sky X-ray survey\, of which I will present its sensitivity to identify dark matter decay with narrow X-ray line emission.
URL:https://www.lapth.cnrs.fr/event/warm-dark-matter-constraints-using-indirect-searches/
CATEGORIES:Weekly seminars
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