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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20220317T103000
DTEND;TZID=Atlantic/Canary:20220317T113000
UID:iactalks-1553
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1553
CREATED:2022-03-17T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Dwarf galaxy stellar haloes
DESCRIPTION:Dwarf galaxy stellar haloes\nDr. Alis Deason\n\n \nThe hie
 rarchical nature of structure formation predicts  that haloes grow by the 
 aggregation of several lower-mass "clumps". A  natural consequence of this
  process is the existence of an extended halo  of stars surrounding galaxi
 es, which is built  up from the debris of destroyed lower mass objects. Th
 e nature of these  haloes has been studied extensively from Milky Way to c
 luster-mass  systems. However, the stellar haloes of dwarf galaxies have b
 een given  relatively little attention.  In this talk, I  will discus
 s recent work using N-body cosmological simulations and  empirical galaxy 
 models to study the  build-up of stellar haloes  surrounding dwarf ga
 laxies. We find that the galaxy formation model  parameters, namely the st
 ellar mass-halo mass relation and  the galaxy occupation fraction, strongl
 y influence the stellar mass  accreted onto dwarf galaxies. Moreover, the 
 type of dark matter can also  be important, as minor mergers are greatly s
 uppressed in warm dark  matter models. Finally, I will discuss the observa
 tional  implications of these results, and the future prospects for  const
 raining small-scale models with observational probes.\n\n \n \nY
 outube:\nhttps://youtu.be/61vvPaHQft4\n \n
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