New structures of the Milky Way stellar and dark halos revealed from the Subaru/Hyper Suprime-Cam survey

Research output: Contribution to journalReview articlepeer-review

Abstract

We present the recent discovery of new halo structures in the Milky Way (MW) based on the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP). HSC is a wide-field imager installed at the prime focus of the Subaru Telescope, and a 300-night survey with this instrument is being carried out in this program. The combination of the superb image quality and depth and the fact that it is a multi-band survey allows us to identify new faint satellites as well as field halo stars in the outskirts of the MW halo beyond the reach of previous surveys. We report here on the new insights into the nature of both stellar and dark halos in the MW as revealed from this on-going survey program and show prospects based on the upcoming large spectroscopic survey with Subaru Prime Focus Spectrograph.

Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalProceedings of the International Astronomical Union
Volume14
Issue numberS353
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • cosmology: dark matter
  • formation
  • Galaxy: halo

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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