SDSS-IV MaNGA: the indispensable role of bars in enhancing the central star formation of low-z galaxies

  title={SDSS-IV MaNGA: the indispensable role of bars in enhancing the central star formation of low-z galaxies},
  author={L. Lin and C. Li and C. Du and E. Wang and Ting Xiao and M. Bureau and A. Fraser-McKelvie and K. Masters and D. Wake and Lei Hao},
  journal={Monthly Notices of the Royal Astronomical Society},
  • L. Lin, C. Li, +8 authors Lei Hao
  • Published 2020
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We analyse two-dimensional maps and radial profiles of EW(H$\alpha$), EW(H$\delta_A$), and D$_n$(4000) of low-redshift galaxies using integral field spectroscopy from the MaNGA survey. Out of $\approx1400$ nearly face-on late-type galaxies with a redshift $z<0.05$, we identify 121 "turnover" galaxies that each have a central upturn in EW(H$\alpha$), EW(H$\delta_A$) and/or a central drop in D$_n$(4000), indicative of ongoing/recent star formation. The turnover features are found mostly in… CONTINUE READING
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