The Missing Satellite Problem Outside of the Local Group

Masayuki Tanaka, Masashi Chiba, Yutaka Komiyama, Mikito Tanaka, Sakurako Okamoto, Takashi Okamoto

Research output: Contribution to journalArticlepeer-review


We report on the first results from our pilot observation of nearby galaxies with Hyper Suprime-Cam. We have observed two galaxies with mass similar to that of the Milky Way Galaxy and measured the abundance of their satellite galaxies in order to address the missing satellite problem outside of the Local Group. We find that (1) the abundance of dwarf galaxies is smaller by a factor of two than the prediction from one of the current hydro-dynamical simulations and (2) there is a large halo to halo scatter. Our results highlight the importance of a statistical sample of nearby galaxies to address the missing satellite problem.

Original languageEnglish
Pages (from-to)196-198
Number of pages3
JournalProceedings of the International Astronomical Union
Issue numberS321
Publication statusPublished - 2016 Mar 1


  • cosmology:observations
  • galaxies:dwarf


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