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SUMMARY:Revealing mass distributions of dwarf spheroidal galaxies in the S
 ubaru-PFS era
DTSTART;VALUE=DATE-TIME:20230322T103000Z
DTEND;VALUE=DATE-TIME:20230322T104500Z
DTSTAMP;VALUE=DATE-TIME:20241114T092434Z
UID:indico-contribution-204@meetings.aip.de
DESCRIPTION:Speakers: Kohei Hayashi (NIT\, Ichinoseki college)\nThe dwarf 
 spheroidal galaxies (dSphs) in the Local Group are excellent test beds for
  probing the properties of dark matter and its role in galaxy formation.\n
 These galaxies are sufficiently close that it is possible to measure line-
 of-sight velocities for large samples of resolved stars. This kinematic in
 formation enables us to study the structural properties of their dark matt
 er halos.\nHowever\, there are non-negligible uncertainties in the determi
 nation of the mass profiles of dark matter. \nIn particular\, this study h
 as been hampered by the well-known degeneracy between dark matter mass den
 sity and the anisotropy of the stellar velocity dispersion tensor\, which 
 can lead to erroneous mass estimates.\nThe information encoded in the shap
 e of the line-of-sight velocity distribution (LOSVD) is potentially a stro
 ng tool to break this degeneracy\, but this requires sufficiently large ki
 nematic samples over the full radial extent of dSphs and identification of
  foreground contamination.  \nThe combination of the 1.25 deg^2 field and 
 2394 fibers of the Subaru Prime Focus Spectrograph (PFS)\, plus pre-imagin
 g with Hyper Suprime Cam\, will allow us to make significant progress in t
 his undertaking. Furthermore\, the unique capability of PFS will permit us
  to revisit the core/cusp problem.\nIn this talk\, I will discuss the feas
 ibility and future prospects for this dark matter study with Subaru-PFS su
 rvey using mock stellar samples.\n\nhttps://iaus379.aip.de/event/20/contri
 butions/204/
LOCATION:Haus H\, Telegrafenberg
URL:https://iaus379.aip.de/event/20/contributions/204/
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