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콜로퀴움

Resolved galaxy kinematics from large HI galaxy surveys 2017-02-16

  • Speaker : Dr. Se-Heon Oh (KASI)
  • Date : 2017-06-07 16:00 ~ 17:00
  • Location : JYS 331-2
  • Host : Dr. Inwoo Han

I will discuss the central dark matter distribution of dwarf galaxies in the local Universe within 10 Mpc derived using their resolved kinematics from Very Large Array (VLA) HI galaxy surveys in tandem with Spitzer 3.6 micron and optical observations. The degree of the central dark matter concentration of the galaxies quantified by measuring their inner density slopes indicates a mass distribution with a sizeable constant density-core towards the centres of the galaxies. This is in contrast to classical dark-matter-only cosmological simulations where cusp-like dark matter distribution is predicted in the halos. Instead, our results are more in line with shallower slopes found in Lambda CDM simulations of dwarf galaxies in which the effect of baryonic feedback processes is included. I will the talk with the discussion of science cases that I plan to carry out at KASI in order to timely prepare for the upcoming SKA era as well as best exploit the observing facilities currently accessible at KASI.

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