The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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MMT Spectroscopy of Early-type Host Galaxies of Type Ia Supernovae

  • Kang, Yijung (Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University) ;
  • Kim, Young-Lo (Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University) ;
  • Lee, Young-Wook (Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University)
  • Published : 2017.04.10
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Abstract

The origin of the well-known correlation between Hubble residual of Type Ia Supernova (SN Ia) and mass of their host galaxies is yet to be fully understood. In our first paper of our YOnsei Evolutionary Supernovae Evolutionary Investigation (YONSEI) project, we found a significant (${\sim}3.9{\sigma}$) correlation between host galaxy mass (velocity dispersion) and population age from high S/N host spectra observed using LCO 2.5 m telescope. Since there is no correlation with metallicity, our result suggests that stellar population age is mainly responsible for the relation between host mass and HR. In order to explore this more directly, we have subsequently observed more sample of nearby early-type host galaxies using MMT 6.5 m telescope. In this poster presentation, we will report our progress in this project and show the preliminary results from our MMT observations.

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