The Missing Satellite Problem Outside of the Local Group

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

doi:10.1017/S1743921316009297

The Missing Satellite Problem Outside of the Local Group

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

SCI - Astronomy

National Institutes of Natural Sciences - National Astronomical Observatory of Japan

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	196-198
Number of pages	3
Journal	Proceedings of the International Astronomical Union
Volume	11
Issue number	S321
DOIs	https://doi.org/10.1017/S1743921316009297
Publication status	Published - 2016 Mar 1

Keywords

cosmology:observations
galaxies:dwarf

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1017/S1743921316009297

Cite this

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abstract = "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.",

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T1 - The Missing Satellite Problem Outside of the Local Group

AU - Tanaka, Masayuki

AU - Chiba, Masashi

AU - Komiyama, Yutaka

AU - Tanaka, Mikito

AU - Okamoto, Sakurako

AU - Okamoto, Takashi

PY - 2016/3/1

Y1 - 2016/3/1

N2 - 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.

AB - 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.

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KW - galaxies:dwarf

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The Missing Satellite Problem Outside of the Local Group

Abstract

Keywords

UN SDGs

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