천문학회보 (The Bulletin of The Korean Astronomical Society)

한국천문학회 (The Korean Astronomical Society)
권호 표지

A Spectroscopic Investigation of the Globular Clusters in the M81 Group

  • Lee, Nawon (Department of Physics and Astronomy, Seoul National University) ;
  • Lim, Sungsoon (Kavli Institute for Astronomy and Astrophysics, Peking University) ;
  • Lee, Myung Gyoon (Department of Physics and Astronomy, Seoul National University) ;
  • Sohn, Jubee (Harvard-Smithsonian Center for Astrophysics) ;
  • Ko, Youkyung (Department of Physics and Astronomy, Seoul National University) ;
  • Hwang, Narae (Korea Astronomy and Space Science Institute) ;
  • Kim, Sang Chul (Korea Astronomy and Space Science Institute) ;
  • Park, Hong Soo (Korea Astronomy and Space Science Institute)
  • 발행 : 2016.10.12
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초록

The M81 Group is the nearest among the known groups of galaxies. HI maps show that all main galaxies of this group are interacting, indicating that this group is in the active phase of formation. On the other hand, wide field imaging shows that globular cluster candidates are found not only in the member galaxies but also between the galaxies in this group. In this study we present preliminary results based on MMT/Hectospec spectroscopy of the globular cluster candidates in this group. We find that the intragroup globular clusters have mostly low metallicity, while the globular clusters in M81 have mostly high metallicity. We will discuss the implication of this result and the kinematics of the globular clusters in relation with the formation history of the M81 Group.

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