The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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A Comparative Study on Star Formation of Barred and Unbarred Disk Galaxies from SDSS-IV MaNGA IFU survey

  • Zee, Galaxy Woong-bae (Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University) ;
  • Yoon, Suk-jin (Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University)
  • 지웅배 (연세대학교 천문우주학과 & 은하진화연구센터) ;
  • 윤석진 (연세대학교 천문우주학과 & 은하진화연구센터)
  • Published : 2017.10.10
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Abstract

We investigate star formation activities of ~400 barred and unbarred faced-on late-type galaxies from the SDSS-IV MaNGA (Mapping Nearby Galaxies at APO) IFU survey. We find the star formation activities in gas-poor, barred galaxies are considerably suppressed than gas-rich, barred galaxies, while there is no difference among unbarred galaxies regardless of their HI gas content. The gas-poor and barred galaxies show the steeper difference of gradient in metallicity and age with respect to the stellar mass than gas-rich or unbarred galaxies, in that their centre is more metal-rich and younger. The results suggest that, combined with the gas contents available, the bar structure plays a significant role in quenching star formation in a galaxy by transporting/mixing gas via gas inflow.

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